Groucho:
Have to say I've noticed a lag in scanning on my Nokia 6.1 (Android 10) since the Bluetooth update. Half the time it's pretty prompt, the other half I find after trying different angles if I point the camera elsewhere and point it back it usually scans first time. Almost like it recalibrates then it's good to go.
Scanning has definitely become more persnickety for me since the Bluetooth update. Running on an iPhone 11.