I don’t spend much time with Unifi APs, but do they dynamically adjust channels or anything?
Many of the more recent WiFi struggles I’ve seen in the community have been related to channels (see [SOLVED] Bond Hub Won’t Find My WiFi)
I suppose if the channels are static and / or are not a solution, it could be something weird with the firmware – or maybe even a rare hardware issue?
What are the first 2 characters of your Bond’s serial?
And what version is your firmware?