Bluetooth Invalid security: Missing AEC-CCM usage

[willberriss]

Hi

Some days the kvm refuses to connect from my RPi 3b+ to my Google Pixel 4 XL phone. On the RPi in /var/log/syslog I see the following message appear after I click "Connect" on the RPI-KVM web interface:

Sep 9 10:04:19 myrpi4 kernel: [ 3293.700433] Bluetooth: hci0: Invalid security: Missing AES-CCM usage

Any ideas what is wrong or what I can do to get it working again?

Thanks in advance

Will

[willberriss]

I have just unpaired the Bluetooth device from the phone and then paired again from the phone and it connected ok. I am now able to Disconnect and Connect from RPI-KVM again. :)

Does the pairing security token expire sometimes or something?