Deleted files are not properly removed from cache

[OwainJ]

Description
Media items deleted from the recycle bin are still served on initial requests on Chromium browsers, on Firefox the file is always served unless you use ctrl+F5, and on chrome on android 13 it is served on every request. Note, the file needs to be requested at least once before deletion for the issue to occour, so maybe there's some weird server side caching going on?
Restarting the web app fixes the issue.

Steps to reproduce:

• Set up an Umbraco 8.18.5 installation with UmbracoFileSystemProviders.Azure 3.0.1 and deploy to an Azure web app with blob storage setup.
• Add a media item with a file
• Navigate to the file to ensure it works
• Delete the media item and then delete it from the recycle bin
• Check the blob storage to ensure that the file has been removed
• Attempt to navigate to the file url again
  • incognito,
  • using a different browser
  • using a different device
• Observe that the file will still be served on the first request
• Restart the web app
• Observe that the issue is now fixed

Demo with Umbraco 8.18.5 deployed to an Azure Web App (Windows B1):

I can reproduce this issue on 5 of my client's projects (running Umbraco 8.15.3, 8.15.4, and 8.15.5) and on a clean Umbraco 8.18.5 installation + UmbracoFileSystemProviders.Azure deployed to an Azure web app. But I cannot reproduce it when running locally.

Using the Diplo God Mode package, I tried clearing the Request Cache, Runtime Cache, Isolated Cache and the Partial Cache, but they had no effect on the issue.

Configs used in my demo (connection strings removed):

Web.config

<appSettings>
   ...
  <add key="AzureBlobFileSystem.ContainerName:media" value="cache-test-media" />
  <add key="AzureBlobFileSystem.RootUrl:media" value="https://[mystorage].blob.core.windows.net/" />
  <add key="AzureBlobFileSystem.ConnectionString:media" value="[connection string]" />
  <add key="AzureBlobFileSystem.MaxDays:media" value="365" />
  <add key="AzureBlobFileSystem.UseDefaultRoute:media" value="true" />
  <add key="AzureBlobFileSystem.UsePrivateContainer:media" value="true" />
</appSettings>

Media\Web.config

<?xml version="1.0"?>
<configuration>
<location path="Media">
  <system.webServer>
    <handlers>
      <remove name="StaticFileHandler" />
      <add name="StaticFileHandler" path="*" verb="*" preCondition="integratedMode" type="System.Web.StaticFileHandler" />
    </handlers>
  </system.webServer>
</location>
</configuration>

config\imageprocessor\cache.config

<?xml version="1.0" encoding="utf-8"?>
<caching currentCache="DiskCache">
<caches>
  <cache name="DiskCache" type="ImageProcessor.Web.Caching.DiskCache, ImageProcessor.Web" maxDays="365" memoryMaxMinutes="1" browserMaxDays="7">
    <settings>
      <setting key="VirtualCachePath" value="~/app_data/cache" />
    </settings>
  </cache>
</caches>
</caching>

config\imageprocessor\security.config

<?xml version="1.0" encoding="utf-8"?>
<security>
  <services>
  	<!--<service name="LocalFileImageService" type="ImageProcessor.Web.Services.LocalFileImageService, ImageProcessor.Web" />-->
  	<service prefix="media/" name="CloudImageService" type="ImageProcessor.Web.Services.CloudImageService, ImageProcessor.Web">
  		<settings>
  			<setting key="Container" value="cache-test-media"/>
  			<setting key="MaxBytes" value="8194304"/>
  			<setting key="Timeout" value="30000"/>
  			<setting key="Host" value="https://[mystorage].blob.core.windows.net/"/>
  		</settings>
  	</service>
  	<service prefix="remote.axd" name="RemoteImageService" type="ImageProcessor.Web.Services.RemoteImageService, ImageProcessor.Web">
  		<settings>
  			<setting key="MaxBytes" value="4194304" />
  			<setting key="Timeout" value="3000" />
  			<setting key="Protocol" value="http" />
  		</settings>
  		<whitelist>
  			<!--<add url="https://[your Azure CDN].vo.msecnd.net/" />-->
  			<add url="https://[mystorage].blob.core.windows.net/" />
  			<add url="https://[mywebsite].azurewebsites.net/" />
  			<add url="http://localhost" />
  			<add url="http://127.0.0.1" />
  		</whitelist>
  	</service>
  </services>
</security>