Crash on app start after trying to send two encrypted images in a DM

**Describe the bug**
I sent two images in a row to my friend in an encrypted DM room and now my app crashes on startup. It seems to crash after an initial sync completes. The crash happened while sending the second image. Upon opening the app a few times trying to get a bug report sent, the second image did send (I presume because it was able to do so before the incremental sync completed).

**Smartphone (please complete the following information):**
- Device: Google Pixel XL
- OS: Android 10.0

**Additional context**
- App version and store: F-droid 1.0.8
- Homeserver: amorgan.xyz

I suspect clearing app storage will fix the issue, but I'll keep it around for testing purposes.