I had similar the first time I ever got condensation in one of my rear lights. Had visible water droplets, but on the day of the appointment it was atypically clement weather and by the time I got to the SC (a good hour drive) it had improved to the point where it was deemed no longer worthy of replacement.Yes. It did exactly that when I booked one last time
That being said - they also told me that they had the wrong side part anyway, so that might have been a factor as well. Shambles.
Subsequent replacements have been done by mobile service and fortunately (?) have still shown issues on the day of replacement, so have never been an issue.