Absolutely! It was a well-documented bug prior to 2019.5 but has been fixed (for many) with this latest version of PT -- I'm surprised that you're still seeing it. I suspect that the answer will be yes but do you have the latest versions of those particular plugins? Have you reset the vram since upgrading to Mojave? It often repairs GUI-related issues.
https://support.apple.com/en-us/HT204063