After latest /e/OS update of June 2025 the wifi connection speed of my Fairphone 4 dropped from max. available with wifi5 (at home I got 275 Mbps down / 55 Mbps up on my router, from FTTB) down to 25 - 30 Mbps.
The wifi connection on the router is settled to 433 Mbps up/down so it should go full speed as I’m used to from before the /e/OS update.
Other devices have no issues, the router is setup the same as before and so working correctly.
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Are you using a VPN?
Are you sure that the Wi-Fi link is using 5 GHz?
Are you seeing the same reduction when you connect to other Wi-Fi networks?
No VPN.
As I said, the only thing that changed was that the update occured.
The Wifi is 5 GHz with 433 Mbps up and down as usual.
The Fairphone is the only device that has a very slow connection on that router (30 / 50 / sometimes for a second 90 Mbps oscillating up and down).
I will try the Murena community as well.
For cross-reference
Same reply as on the other place.