Jump in long title tag warnings on SEMrush

Hi all, I've been doing this for a minute and usually can figure things out, but this time I'm stumped. I've been slowly chipping away (since being brought on) at all the errors/warnings from the SEMrush site audit and was slowly working on decreasing the title tag length. However, on this week's report, it jumped from \~100 to \~400 titles that are too long, according to SR. Whenever I contact SEMrush support, they're friendly but typically generic so I thought I would ask here. We haven't had a large content push recently (maybe like 2 blogs a week, event pages, etc. but nothing big) so I am baffled by this. Does anyone have any insight? My supervisor is stumped as well, lol. Thank you!