They've been using crypto libraries, while marketing themselves as a Bitcoin app, yes, and it sort of bubbled up, due to an attack on the library.
Primal web repo hasn't moved in 6 months, not even a bug-fix, but they rolled back this particular commit, last night. 😅 

Their whole "Bitcoin Nostr" schtick always rubbed me the wrong way, anyway, as Nostr isn't supposed to just be for Bitcoiners, and they turned Nostr into a feeder for Strike KYC, but whatever.

https://media.tenor.com/i2V9q28KQ0QAAAAC/dottie-underwood-agent-carter.gif