This is not the solution - I am using Teamview for personal use and I have a 1920x1080 laptop controlling a 1920 x 1080 desktop. The scaling issue seems to randomly occur. When it does, the text on the Teamviewer app on the controlling computer goes small, indicating that the remote computer is going to do the same thing. I tried ctrl + on the controlling computer before I connected to the remote computer and it worked once.
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