...fixed:
- made a backup of my molly/signal data
- cleared molly app cache and deleted data
- updated molly from v7.39.5-2-FOSS -> v7.42.1-2-FOSS
- restored the account from backup, re-registered device
- re-linked laptop
don't remember how I got molly running in multiple profiles on grapheneos but at least I'm back in business for now