Few-jit-tiv,
Wireless can be tricky, milage can be different for different people, for different AiMesh devices, different Region & environment, etc.
For my configuration (see my signature), with Wired Backhaul, it works without any WiFi issues, Both (a) where, I just upgrade firmware over GUI (dirty flash) and run for 24 hours (b) after that, I did a complete Factory Reset and run for over 1.5 days also no issue.
For my Wifi settings:
(1) I always start with DEFAULT NVRAM settings of both Stock and Merlin firmware.
(2) I did the following changes based on what I gleaned from this forum over the years. Maybe, just use it for comparison, so that you can experiment and hopefully can be useful for your situation.
Wireless - General:
- Wireless Mode: I disabled 11b (because I do not have such devices at home)
- 2.4 GHz Channel bandwidth: I set to a fix 20MHz bandwidth
- 2.4 GHz Control Channel: I fix it on channel 11
- 5.0 GHz Channel bandwidth: I set to a fix 80MHz bandwidth … disabling 160 MHz (I have a AC AiMesh Node)
- 5.0 GHz Control Channel: I fix it on Channel 161
Wireless - Professional
- 2.4GHz Roaming assistant: I disabled it (following Merlin’s firmware default)
- 2.4GHz Explicit Beamforming: I disabled it
- 2.4GHz Universal Beamforming: I disabled it
- 5.0GHz Roaming assistant: I disabled it (following Merlin’s firmware default)
Guest Network: I have Guest network 1, setup with only 5GHz band, Sync to All AiMesh nodes
Hoping the suggestion above can be useful. Let me know if you need to do some specific comparison.