If blue light does not blink within 10 seconds (sometimes the logic is reversed, so it stays on, and blinks off every few seconds, that’s normal), it sounds like the software is getting stuck somewhere, which could be because of sensor reading or something. On the other hand, if you can still connect to it (albeit very slowly), that means it’s still running and the blue light should blink even if very infrequently. Something isn’t very consistent here, I feel.