After Update to 1.497.1916.12 K2 Wifi reconnects every 11 seconds.

I recently updated my Karoo 2 to Version 1.497.1916.12. Since that, every wifi connection is reconnecting after about 11 seconds. No matter what wifi is used.

I tested with our home wifi and my mobile-tethered hotspot, which both worked before the update.

I removed all saved wifis and reconnected the two mentioned above but got the same result, I also used the WPS button as a third alternative of establishing the connection.

Same behavior after a factory reset, but now, due to the instable wifi, it is hard for the K2 to sync.

Hope someone has a clever idea.