I'm not crazy for this but Annie's flashbacks in season 4 are wildly different to the ones we got in season 1 and the OVA. She seems way more distressed in the prior version compared to how she described it to Hitch in season 4. I really do hope this detail was intentional
it's probably disorienting as hell for the ex-titan shifters post-rumbling to get minuscule injuries like a bruise or a cut that aren't life threatening but don't heal immediately