GL Ahsoka Tano Tier IV crashing every time

I'm not sure if this is related to very recent updates, but: I can no longer complete the tier IV mission for unlocking Galactic Legend Ahsoka Tano (and I only need to do it once more for the final set of shards!). Sometimes the mission crashes out during the opening cut-scene (towards the end), but more often it at least begins the first battle. Sometimes I can get through the entirety of the first battle, but the second battle has never started. Also: there's no sound beyond the opening cut-scene.

At each point when it fails, it's usually in the form of freezing - whether it's mid-attack, or transitioning between the battles. Very rarely, I've found the game just fully crashes (closes down). If I let my phone's screen go to sleep, whenever I wake it back up I find the game has been closed (even though it was the active app). This is on iOS 18.7, iPhone 15. I've tried restarting my phone, force-closing all other apps, reinstalling the game. No luck.

I did not have this problem prior to today's update (with the B-Wing announcement) - I've successfully completed this mission twice, and I've been able to finish tiers 2, 3 and 5 today as well (post-update). I'd already completed tier 1 prior to the update.