If there is a serious concern about FTF or FTE with a particular gun, it might be best to practice/test a bit with it before having to take the proficiency test. If it runs reasonably well in the practice/test session, you should be good to go but you might want to clean and lube it before taking the test.
I agree.
And if failures happen with any frequency while practising I'd fix the gun before the class, especially if it will
be your carry gun.