Datafield crashes when updating SDK from 6.3.1 to 7.3.1

Hello,

My datafield registers to 3 BLE GATT profiles with Toybox.BluetoothLowEnergy.registerProfile(), the first one registered is a custom service with 3 characteristics.
With SDK 6.3.1 registration is ok.
With SDK 7.3.1 first registration failed, unhandled error is returned in callback onProfileRegister() and then app crashes.
My custom service has 3 characteristics, 1 to write and 2 to notify. If I remove 1 characteristic to notify, there is no crash.

The problem is reproduced on simulator, see logs in attachment.

Is there any major changes in BLE since SDK 7 ?