RDP via Html5 can't type username+password

Hello. We run version 9.705-3. I configured Web Portal with OTP and configured an Html5 portal to connect to internal RDP server. The connection is possible and the username+password of the RDP server appears. Bu the user can't type anything. The server is a Windows 2019 server. If i change the server and direct it to a Windows 2012 server then the user can type username+password and procceed normally.

Is there some specific setting for 2019 server? I disabled NLA