As I've stated before, problem is happening on v21, 22 and 23, it gets worse after a few hours. All I can relate to is this topic:
Ath10k: the dreadful bug "deauthenticated due to inactivity (timer DEAUTH/REMOVE)" - Installing and Using OpenWrt - OpenWrt Forum
@the4anoni mentioned that going back to v19 fixed all issues. I will try that and report back.
Edit1: didn't work, had all 2.4ghz randomly disconnecting. I've unplugged each client and went connecting one by one. They all work fine until the driver starts to pop errors. Went back to 23.05 and the same happened. This is what kernel log shows:
Sun Jun 9 16:06:11 2024 kern.info kernel: [ 711.998838] ath10k_pci 0001:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0 arvif->paused: 0x0
Sun Jun 9 16:06:12 2024 kern.info kernel: [ 712.058720] ath10k_pci 0001:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0 arvif->paused: 0x0
Sun Jun 9 16:06:12 2024 kern.info kernel: [ 712.208711] ath10k_pci 0001:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0 arvif->paused: 0x0
Sun Jun 9 16:06:12 2024 kern.info kernel: [ 712.348699] ath10k_pci 0001:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0 arvif->paused: 0x0
Sun Jun 9 16:06:12 2024 kern.info kernel: [ 712.478700] ath10k_pci 0001:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0 arvif->paused: 0x0
Sun Jun 9 16:06:12 2024 kern.info kernel: [ 712.608738] ath10k_pci 0001:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0 arvif->paused: 0x0
Sun Jun 9 16:06:12 2024 kern.info kernel: [ 712.617682] ath10k_pci 0001:01:00.0: mac flush null vif, drop 0 queues 0xffff