I've got the same issue after upgrading to Lineage 18. I can connect to my phones hotspot without problem but the tablet refuses to connect to my openwrt access point. Other android 11 devices (running calyxos) do connect fine.ROM works and can even be used with an older version of the security patches as long as you flash the correct (older) TWRP after flashing the ROM (although the pain of doing a full device update by flashing the newer stock rom first, is worth it).
But I have the following issue: I cannot connect to a specific WiFi network created by my Fritz Repeater 1750E, it is the one to which the device was connected before the upgrade of the ROM (I used an older version from last year before). All other wifi networks work.
It is basically the same issue as described here for the SM-T580:
WLAN/Wifi connection issue after flashing Samsung SM-T580 with lineage 18.1 (release January 22, 2022)Hi all I flashed the Samsung Galaxy Tab A 2016 SM-T580 with: 1. TWRP 3.60_9 2. LineageOS 18.1 20220122 (gtaxlwifi) -> see posts here in XDA forum 3. GApps 11 pico downloaded 20220204 I uses also Odin 3.14.4 to root the device In summary, it...forum.xda-developers.com
It is stuck at "saved" and "Failed to connect to network". I am sure this is not a password issue. Anybody has got any ideas?