Quote from BeutjuYour addon seems to be interfering with examiner. When I have a look at other players' talents with examiner and switch the tabs for the three talent specs; your addon seems to also retrieve this data for other players so the talents from other players show up and examiner gets bugged.
Could you make a quick "fix" like an option to disable talent check.
Try disabling the weapon buff check. I don't think it's the talents causing it - instead the weapon inspection.
But Examiner should be able to handle this. If Examiner is not already using LibTalentQuery then it should switch to using it.