As Bob alluded to, make sure PT is opening the desired program (newer version).
That's the first thing I'd try.
An issue with a version a couple versions old also begs the question; is that 2020 version running the latest updates for that version?

Again, as Bob mentioned, I do sometimes use an older version for access to certain 32 bit plugins, but I make sure it is the latest supported version.

https://www.pgmusic.com/support_windows_pt.htm
/link was kind of hard to find .. but may help for the 2020 version .. preferable would be to make the shortcut use the newer version unless you need an older version for some specific reason (like 32 bit)

I do not work here, but the benefits are still awesome
Make your sound your own!