Trying to understand how it works...

[Prikalel]

UE-Bluetooth-Support/Source/BluetoothSupport/TaModuleAPL.xml

Line 257 in c4f5969

new Thread() {

Why do you create new thread here?
As it mentioned in documentation we can just do that:

mHandler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    stopLEScan();
                }
            }, scanTimeoutMillisecond);

Isn't it?

[Prikalel]

And why do you use Lock here:

UE-Bluetooth-Support/Source/BluetoothSupport/Private/Android/AndroidGateway.cpp

Line 233 in c4f5969

ReceiversLock.Lock();

?
Is it necessarily?
Let us say, I made java-side absolutely consistent (no new threads or async tasks) then do I need this lock when calling c++ from java?