I'm having the same problem with an Huawei Matebook D14 2020 R5 with their bluetooth mouse.
What I noticed using bluetoothctl is that the mouse device ID changes:
D9:73:24:7E:1A:0E (random)
I've seen 0E, 0F, 0C, 0B, etc.
I don't know if it's suppose to be like that or not.
I'm having the same problem with an Huawei Matebook D14 2020 R5 with their bluetooth mouse.
What I noticed using bluetoothctl is that the mouse device ID changes:
D9:73:24:7E:1A:0E (random)
I've seen 0E, 0F, 0C, 0B, etc.
I don't know if it's suppose to be like that or not.