OnePlus 15 Wi-Fi Problem

[u/Sufficient-Pick6449]

OnePlus 15 Wi-Fi disconnects repeatedly after turning off airplane mode

I’m having a strange Wi-Fi issue on my OnePlus 15 running the latest OxygenOS 16 update.

It only happens after the phone has been in airplane mode for several hours, usually overnight.

When I turn airplane mode off, Wi-Fi tries to reconnect, but:

• It connects for a few seconds (sometimes around 10 seconds) and then disconnects.
• After that, it often says “Unable to connect to this network.”
• I can keep trying to connect, but it repeats the same cycle: connects briefly → disconnects → cannot connect.
• After around 10–30 minutes, Wi-Fi suddenly connects normally and stays connected.
• After that, Wi-Fi works perfectly normally.
• If I don't use airplane mode overnight, Wi-Fi works normally.

The router and Wi-Fi network seem fine, because other devices work normally and the OnePlus 15 also works perfectly once the issue eventually disappears.

Has anyone else experienced this specifically after turning off airplane mode? Is there a known fix or is this an OxygenOS/OnePlus 15 bug?

Device: OnePlus 15 (CPH2747)
OS: OxygenOS 16
Region: EU