HTML5 RDP has latency issues with IE (Internet Explorer) and Microsoft Edge browser with Windows server 12, however works with Chrome.
This is issue aused due to the visual effects that is getting started, with HTML5 RDP disables the visual effects on IE and Edge browser.
Follow the below link to disable the visual effect manually.
There is a link to show how to disable the animation on Windows 2012:
https://serverfault.com/questions/521782/how-do-i-disable-the-animations-in-microsoft-server-2012
Please refer third answer in the link about how to configure in group policy.
Navigate to Remote desktop- Go to Control Panel > System > Advanced system settings > Advanced > Performance > Settings
Set it to "Adjust for best performance"
