Creality Print 5.1 doesn't connect to K2 on local network

Hi, my K2 is connected via WLAN. It shows its status as ‘connected’ and I can also see the device on my router’s list of connected devices.
I have the latest version of Creality Print 5.1.7.10514. When I first got the K2 it worked. But since 2…3 days I don’t get Creality Print to detect the K2 and I’m not aware of any change in the setup of my PC. I tried to connect to different WLAN SSIDs (5GHz, 2.4GHz) but it didn’t help. I even tried to manually add the printer but this doesn’t work either.
Any idea what I could check to make it work again?
kr Michael - Switzerland

P.S.: What I forgot to mention: I have a K1 Max which works right next to the new K2. There is absolutely NO problem with the connection of Creality Print and the K1.

Have you tried assigning static IPs for each printer?

Not yet. On the other hand the IP is the same since ever. It seems my router doesn’t assign IPs randomly but re-assigns the same IP for devices which have been connected before (if possible).

In other words: There was never a need for Creality Print to connect the K2 with another IP then the one it was connected to in the past - when it still worked.

Update: I don’t use the Creality App very often. Today I realized that the App is connecting to the K2 printer and shows the current status of a print. But the video stream doesn’t work.

It seems I found the solution… I have WLAN access points with multiple SSIDs, e.g. für 2.4GHz, 5GHz, guests,…
By chance the 5GHz SSID was on top of the list and I connected it. Which seems to be the cause of my problems.
Now I switched to 2.4GHz and Creality Print found the printer in seconds.
I have no clue what caused this because with every SSID my router shows the connection of the K2 with the network and even Creality Cloud (working on the same machine as Creality Print) or Creality Cloud App worked with the 5GHz connection. Just not Creality Print…

Creality: Please find the cause of this behavior!

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