There may be a problem with Bluetooth on the 7.3 builds that I have made this month. If you see an update for your device, please do not install it yet - it may stop Bluetooth from working.
I will do more testing, and report back
EDIT: I’ve now tested on pdx235, and BT seems to be working fine in our 7.3 builds. So, false alarm, and apologies for the panic: