I wrote it also on the other thread:
I noticed the same WLAN behavior on my Sony XZ2 Compact (community port) just before I started daily-driving the Jolla C2 in November 2024, so I conclude an update to a WLAN Software component before SFOS 5.0 introduced this strange problem.
My C2 would’t do gps before the update. (csd tool - gpsinfo) After a reflash and the latest update, gps works again. But no gyro or compass.
Wifi works very slow, compared to my xperia 10 III and my xperia XZ2. Streaming a video is not comfortable with al the hickups in playback, downloading app updates from aurora store takes 3x’s as long as my 2 other phones. Didn’t test with mobile network yet, but wifi should not be so slow …
Missed calls is another issue that I’m having during the reported WiFi/Cellular switching issues.
These will devert to my Android device when they happen.
Another hiccup last night when the phone didn’t switch from WiFi to Cellular when I left home.
The WiFi icon in the status area was greyed out and the cellular data icon was missing until I restarted the phone.
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Since there is no WiFi calling this should be a separate issue. Or why do you bunch it in here?
That’s because it’s related to the issue outlined by other posters with regard to Cellular not switching back to WiFi and vice versa.
i.e WiFi not switching to Cellular when out of range and Cellular not switching back to WiFi when coming back into range.
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Update. Things have been quite stable over the last few days.
Phone has been switching between WiFi and mobile network without issues. 
I ferckled around in App Support Settings, but not sure if I changed something, didn’t make a note 
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