Flashing rainbow after pluggin it in

I have the onlykey with 6 buttons. When I plug it in, I routinely get a flashing rainbow (cycle through every color) for what may be 30+ seconds or doesn’t seem to stop. Sometimes it will eventually start working correctly. Sometimes I plug it in and it comes up ready to be used within a couple seconds.

I have tried reflashing the firmware but it didnt help.

Any idea if this is normal or if its starting to fail?