Just got new router: Archer AX50

My system:

Kitchen - 2xsonos one gen2
Living room: sonos beam + 2xone gen2 + sonos sub
Bedroom: sonos amp with 2 passive speakers and sub

When i first got the router last Friday, i was able to get the current sonos system connected to the router by plugging one of the kitchen speakers directly in with an ethernet cable, connect the current network to the new 5ghz network, then unplug the speaker back to the kitchen and job done.

Now i woke up this morning and couldn’t see the system again, repeated the step with connecting one speaker to the router again (after completed the sonos app recommended with unplug, restart router and so on).

So what do i do now, do i have to factory reset and setup everything again from scratch, or what would work?