Versions 5.180 and newer, including release 5.193 and alpha 5.194, infinitely crash, reboot, and repeat when using Stream Deck. Downgrading to 5.161 resolves the issue (I did not try versions between 5.161 and 5.180—just jumped back to a release date I was certain I'd been using BTT without issue). The BTT buttons do not load on Stream Deck (placeholder icons do show up) and the BTT app proceeds to crash repeatedly while serving macOS error notifications stating "Restarting Stream Deck".
This occurred on macOS 15.3. I then updated to 15.3.1 (which included a reboot) and the problem did not resolve. Only manually downgrading alleviated the issue.