Lost access to Virtual Game Cards.

Any reason why any console would lose access to the virtual game cards?

I share my main account with a friend who lives in another city and the other console that has access to the VGC is a Switch OLED so my son can access my games with his accounts (I play my games with online access on my Switch 2).

This weekend my son had trouble to open some games and I noticed that the Switch OLED wasn't linked to VGC access anymore. (This happened before the 23.0 update)

I've made my research and I can't find how my 5 year-old could have unlinked my account accidentaly prior the firmware update. Also, I doubt my friend had anything to do with this.

Any hints on what could have happened?

I'll have to wait until I visit my friend from another city to fix the account access, which is a bummer for my kid. I've already used the browser method to unlink an account this year so that's not an alternative to fix this earlier. But I'm still intrigued on what could have happened.