Pet Tracker had a very recent update (two days ago), so perhaps this is a bug Jailborc addressed?
Editing to add: no, this is still being reported as a bug in that most recent version.
A more focused workaround appears to be to disable just the PetTracker-Battle module, but for me that would defeat the purpose of using the addon. (The world map pet tracking isn’t useful now that I have all the Safari achievements done, but seeing my opponent’s moveset and cooldowns is critical within a pet battle.)