diff --git a/app/Entities/Repos/PageRepo.php b/app/Entities/Repos/PageRepo.php
index 4c59db468..bc6476824 100644
--- a/app/Entities/Repos/PageRepo.php
+++ b/app/Entities/Repos/PageRepo.php
@@ -177,17 +177,13 @@ class PageRepo
         // Hold the old details to compare later
         $oldHtml = $page->html;
         $oldName = $page->name;
+        $oldMarkdown = $page->markdown;
 
         $this->updateTemplateStatusAndContentFromInput($page, $input);
         $this->baseRepo->update($page, $input);
 
         // Update with new details
         $page->revision_count++;
-
-        if (setting('app-editor') !== 'markdown') {
-            $page->markdown = '';
-        }
-
         $page->save();
 
         // Remove all update drafts for this user & page.
@@ -195,7 +191,10 @@ class PageRepo
 
         // Save a revision after updating
         $summary = $input['summary'] ?? null;
-        if ($oldHtml !== $input['html'] || $oldName !== $input['name'] || $summary !== null) {
+        $htmlChanged = isset($input['html']) && $input['html'] !== $oldHtml;
+        $nameChanged = isset($input['name']) && $input['name'] !== $oldName;
+        $markdownChanged = isset($input['markdown']) && $input['markdown'] !== $oldMarkdown;
+        if ($htmlChanged || $nameChanged || $markdownChanged || $summary !== null) {
             $this->savePageRevision($page, $summary);
         }
 
@@ -224,10 +223,6 @@ class PageRepo
     {
         $revision = new PageRevision($page->getAttributes());
 
-        if (setting('app-editor') !== 'markdown') {
-            $revision->markdown = '';
-        }
-
         $revision->page_id = $page->id;
         $revision->slug = $page->slug;
         $revision->book_slug = $page->book->slug;
@@ -290,7 +285,13 @@ class PageRepo
 
         $page->fill($revision->toArray());
         $content = new PageContent($page);
-        $content->setNewHTML($revision->html);
+
+        if (!empty($revision->markdown)) {
+            $content->setNewMarkdown($revision->markdown);
+        } else {
+            $content->setNewHTML($revision->html);
+        }
+        
         $page->updated_by = user()->id;
         $page->refreshSlug();
         $page->save();
diff --git a/app/Entities/Tools/TrashCan.php b/app/Entities/Tools/TrashCan.php
index d2447ec68..df98fd318 100644
--- a/app/Entities/Tools/TrashCan.php
+++ b/app/Entities/Tools/TrashCan.php
@@ -273,11 +273,11 @@ class TrashCan
             $count++;
         };
 
-        if ($entity->isA('chapter') || $entity->isA('book')) {
+        if ($entity instanceof Chapter || $entity instanceof Book) {
             $entity->pages()->withTrashed()->withCount('deletions')->get()->each($restoreAction);
         }
 
-        if ($entity->isA('book')) {
+        if ($entity instanceof Book) {
             $entity->chapters()->withTrashed()->withCount('deletions')->get()->each($restoreAction);
         }
 
@@ -286,19 +286,20 @@ class TrashCan
 
     /**
      * Destroy the given entity.
+     * @throws Exception
      */
     protected function destroyEntity(Entity $entity): int
     {
-        if ($entity->isA('page')) {
+        if ($entity instanceof Page) {
             return $this->destroyPage($entity);
         }
-        if ($entity->isA('chapter')) {
+        if ($entity instanceof Chapter) {
             return $this->destroyChapter($entity);
         }
-        if ($entity->isA('book')) {
+        if ($entity instanceof Book) {
             return $this->destroyBook($entity);
         }
-        if ($entity->isA('shelf')) {
+        if ($entity instanceof Bookshelf) {
             return $this->destroyShelf($entity);
         }
     }
diff --git a/tests/Entity/PageRevisionTest.php b/tests/Entity/PageRevisionTest.php
index 68a8f01a9..62fbfbf31 100644
--- a/tests/Entity/PageRevisionTest.php
+++ b/tests/Entity/PageRevisionTest.php
@@ -66,6 +66,36 @@ class PageRevisionTest extends TestCase
         $pageView->assertSee('def456');
     }
 
+    public function test_page_revision_restore_with_markdown_retains_markdown_content()
+    {
+        $this->asEditor();
+
+        $pageRepo = app(PageRepo::class);
+        $page = Page::first();
+        $pageRepo->update($page, ['name' => 'updated page abc123', 'markdown' => '## New Content def456', 'summary' => 'initial page revision testing']);
+        $pageRepo->update($page, ['name' => 'updated page again', 'markdown' => '## New Content Updated', 'summary' => 'page revision testing']);
+        $page = Page::find($page->id);
+
+        $pageView = $this->get($page->getUrl());
+        $pageView->assertDontSee('abc123');
+        $pageView->assertDontSee('def456');
+
+        $revToRestore = $page->revisions()->where('name', 'like', '%abc123')->first();
+        $restoreReq = $this->put($page->getUrl() . '/revisions/' . $revToRestore->id . '/restore');
+        $page = Page::find($page->id);
+
+        $restoreReq->assertStatus(302);
+        $restoreReq->assertRedirect($page->getUrl());
+
+        $pageView = $this->get($page->getUrl());
+        $this->assertDatabaseHas('pages', [
+            'id' => $page->id,
+            'markdown' => '## New Content def456',
+        ]);
+        $pageView->assertSee('abc123');
+        $pageView->assertSee('def456');
+    }
+
     public function test_page_revision_restore_sets_new_revision_with_summary()
     {
         $this->asEditor();
diff --git a/tests/RecycleBinTest.php b/tests/RecycleBinTest.php
index 60f06cfc4..55a9571de 100644
--- a/tests/RecycleBinTest.php
+++ b/tests/RecycleBinTest.php
@@ -1,7 +1,10 @@
 <?php namespace Tests;
 
 use BookStack\Entities\Models\Book;
+use BookStack\Entities\Models\Bookshelf;
+use BookStack\Entities\Models\Chapter;
 use BookStack\Entities\Models\Deletion;
+use BookStack\Entities\Models\Entity;
 use BookStack\Entities\Models\Page;
 use DB;
 use Illuminate\Support\Carbon;
@@ -129,6 +132,21 @@ class RecycleBinTest extends TestCase
         $redirectReq->assertNotificationContains('Deleted '.$itemCount.' total items from the recycle bin');
     }
 
+    public function test_permanent_delete_for_each_type()
+    {
+        /** @var Entity $entity */
+        foreach ([new Bookshelf, new Book, new Chapter, new Page] as $entity) {
+            $entity = $entity->newQuery()->first();
+            $this->asEditor()->delete($entity->getUrl());
+            $deletion = Deletion::query()->orderBy('id', 'desc')->firstOrFail();
+
+            $deleteReq = $this->asAdmin()->delete("/settings/recycle-bin/{$deletion->id}");
+            $deleteReq->assertRedirect('/settings/recycle-bin');
+            $this->assertDatabaseMissing('deletions', ['id' => $deletion->id]);
+            $this->assertDatabaseMissing($entity->getTable(), ['id' => $entity->id]);
+        }
+    }
+
     public function test_permanent_entity_delete_updates_existing_activity_with_entity_name()
     {
         $page = Page::query()->firstOrFail();