The first tank was ~200 rounds in 4 days, so basically 50 rounds per day which isn't exactly very high tempo (I remember in an episode of Chuahuahui on the VT-4 matter they mentioned Russo-Ukrainian war, Russian tanks fired 60-70 rounds per tank per day in 2022), it leaves ample time for them to do whatever field maintenance is required, considering they weren't really maneuvering either. I doubt they were pumping out rounds at max RPM either, I mean it takes like max 15-20 minute to fire 50 rounds at max RPM including the time required for one full reload of the autoloader, so they either just sat in their position doing nothing for the rest of the day which I feel like is unlikely or they pumped out few short burst of rounds every now and then which is far more likely.