TeamViewer 15.10.5 extremely slow on Ubuntu 20.04
Hmmm. The issue has corrected itself at this time but will post this anyway for engineering's info. I went to the console of that server and checked to see if the issue was with Ubuntu or TeamViewer and that's when it corrected itself. Here's hoping it stays that way.
I just installed Ubuntu Server 20.04 and added a xfce GUI. TeamViewer v15.10.5 was extremely slow - two to five second delays when attempting to perform any action with the GUI.