@revocarne Hi, I just wanted to tell you, that I got the same or a similar issue, since I switched my router configuration from two separate WiFi's to one WiFi with both (2.4, 5 GHz) frequencies...
In my case, it is enough to reconnect the WiFi (just tapping o the already connected WiFi-network again.)
Solution for me is, to separate the networks again, at least for now.
I believe that this could be a general issue on Halium(9) devices.