Usually not. If your watch stops sending workouts or the app looks out of date, the most common cause is that Garmin Connect itself has signed you out or needs re-authorization on the watch or phone — a Garmin account state, not a BulkForged bug.
Open the BulkForged app on the watch and look at the status row at the top of the routine list — it tells you which of these you're in:
Re-pair the watch to your BulkForged account: on the phone, go to Settings → Account & watch → Pair your Garmin watch, tap Generate pairing code, then on the watch open BulkForged and choose Pair watch from its menu to enter the code. Re-pairing issues a fresh, revocable token — it doesn't touch anything already logged.
Related: "Account & watch", "Pairing your watch to your account".