Fixes #5456 - Uploading an avatar is not possible if it was deleted in between.

Co-authored-by: Dusan Vuckovic <dv@zammad.com>

app/assets/javascripts/app/controllers/_profile/avatar.coffee

@@ -145,6 +145,8 @@ class ProfileAvatar extends App.ControllerSubContent
 
       reader.readAsDataURL(@)
 
+    @fileInput.val('')
+
 App.Config.set('Avatar', { prio: 1100, name: __('Avatar'), parent: '#profile', target: '#profile/avatar', controller: ProfileAvatar, permission: ['user_preferences.avatar'] }, 'NavBarProfile')
 
 class ImageCropper extends App.ControllerModal

spec/system/profile/avatar_spec.rb

@@ -0,0 +1,46 @@
+# Copyright (C) 2012-2025 Zammad Foundation, https://zammad-foundation.org/
+
+require 'rails_helper'
+
+RSpec.describe 'Profile > Avatar', type: :system do
+  let(:image) { Rails.root.join('spec/fixtures/files/image/squares.png') }
+
+  before do
+    visit '#profile/avatar'
+  end
+
+  it 'can re-upload the same image afterwards (#5456)' do
+    within :active_content do
+      # Upload an image.
+      find('input.js-upload', visible: :all).set(image)
+    end
+
+    in_modal do
+      click_on 'Save'
+    end
+
+    within :active_content do
+      # Simulate hover to make the delete button visible and click on it.
+      page.execute_script("$('.avatar-delete').css('visibility', 'visible').click()")
+
+      prompt = page.driver.browser.switch_to.alert
+      prompt.accept
+
+      await_empty_ajax_queue
+
+      # The input should be empty now.
+      expect(find('input.js-upload', visible: :all).value).to be_empty
+
+      # Re-upload the same image.
+      find('input.js-upload', visible: :all).set(image)
+    end
+
+    in_modal do
+      click_on 'Save'
+    end
+
+    within :active_content do
+      expect(page).to have_css('.avatar-holder .avatar')
+    end
+  end
+end