The place where the identified issues should be opened is as follows:
https://github.com/MiSTer-devel/PCXT_MiSTer/issues
But as I have already said to other users, I ask you to please do the same tests under the same conditions before opening the issue... i.e. same HD image, same machine, etc... in a real or emulated environment, such as PCem or 86Box (selecting Tandy 1000, IBM5160...). These environments are very stable nowadays in the emulation of these machines.
Thank you all for your understanding