U2F recognition

Two Factor Authentication
1

Hello. What makes an OnlyKey recognized by a website while other OnlyKeys are not?

In my example I have a Yubikey and OnlyKey plugged in (and unlocked).
Only the Yubikey is registered to website A, not any OnlyKey.

For Onlykey #2 the light flashes/blinks blue when asking for U2F prompt after log in to web site A.
Onlykey #1 does not blink blue in this case. Neither OKYs are registered.

Onlykey 1 and Onlykey2 have different credentials including presence of derived GPG keys for use with Pass GPG password manager and HMAC CR keys (Onlykey 1).

Onlykey 2 does not have any derived or stored keys of any kind.

Both have same firmware 3.0.4.

Basically I’m trying to get Onlykey 2 to type out the U2F PIN when logging into site A but it can not do so since it is flashing in response to challenge from site A, despite not being registered there.

Again Onlykey 1 does not have this behavior and also is not registered to website A.

Firmware is 3.0.4 for both and desktop app is 5.3.6

Is there a way to disable U2F?

Thanks

2

hello.
I’m posting this again since no response.
How do I prevent OnlyKey from flashing when a website requests response from FIDO challenge?

I don’t have any Onlykeys registered at any site but one the OKYs lights up; the other (different credentials) does not. This is reproduced for another 2 set OnlyKeys with identical credentials as the 1st two.

I have erased any possible FIDO keys from the OnlyKey in question using the CLI but still the OKY lights up and so am unable to use any of the slots to type out a credential.

Basically is there a “disable FIDO” function?
Please advise