Xiaomi robot vaccums : unavailable?

Hello,

does the vaccum easily become unavailable in HA? I got a router with wifi and a dumb access point connected with cable that also does 2.4 and 5.2ghz wifi. Recently I added a new vaccum and it was working fine for a while. After restarts of my router and AP it doesn’t work anymore. Where do I begin?

Static lease on the router. Works as it should now.