RDS 2019 HTML 5 keyboard shortcuts

Hi everyone,

We have implemented HTML5 with Azure application to allow users to connect from home to our RDS servers.

It works great, however a couple of issues we found:

1. keyboard shortcuts such as ALT+TAB (ALT+PageUP) not working (Or I need to change something somewhere)
2. When publishing remote app to user it removes the remote desktop option.
3. Icons are not display correctly... the user sees broken image icon
4. Sometimes when clicking on an icon it won't work and a page refresh is required which results in another login page.
5. When changing language (using ALT+SHIFT), the RDS is not using the language configured in the session. It uses the language from the local computer.

We would like to use HTML5 as it is more secure than the the RDP protocol.

If there are any resolutions to what I wrote it would be amazing. 

Rahamim.