Uncaught Error: Got BLE error code 12292 in 1v99 cutting edge but not in release

does 1v99 release preceed 1v99 cutting edge, or is it the other way around?

Yes - 1v99 is older than the cutting edge.

So looking at the code, you're not actually calling tap until you've had the callback to the last one? As you say, that sure seems like it should be fine. I'll take a look.