BleError: Cannot start scanning operation on certain Android Phones

I am getting the above error on certain android phones when trying to initiate a scan. I am trying to track down exactly what version and model the phones are, but do you have any insight into what would cause this error to be thrown? The call I am making is manager.startDeviceScan([serviceId], {allowDuplicates: false}, async (error, device) => {});

Is it possible that this version of android doesn’t support either allowDuplicates false or scanning by serviceId?

[jbreuer95]

I ran into this problem and found some conditions when it occurs and how to prevent it;

1. It mostly seems to happen on cheaper android phones.
2. When you are developing and have fast refresh enabled make sure you properly destroy the old ble manager and start a new one. If you don’t, you start multiple ble managers and multiple scans at the same time. This will cause this error for sure. Put a console.log in your scan function to monitor for this.
3. Dont make your scans very short. I get this sometimes when my scans are 1 or 2 seconds. I now have them at 6 seconds and i dont see this error anymore

[hsmade]

When I disable bluetooth, then start the app, wait for a bit and re-enable bluetooth, the scanning works. However, it disconnects after a few seconds. This smells of an Android bug