Hello Hans,
There should not be any interference as far as I can see. The servo library uses regular pins so does the ads7833 library.
If you could share your program that could help to analyze the issue.
I did hear from Peter some time agaon that he had problems with regular pins when using PPS. That was solved by defining the regular pins after PPS was done.
If he declared them before executing PPS (not sure by the way if you are using PPS) then it did not work. Strange behaviour btw.
Kind regards,
Rob