WIFI disappears until reboot

Ok so I've encountered this on multiple devices across multiple networks so I'm 90% sure it's an issue with the core OS but it's been happening for over a year and hasn't been fixed at all. About once a day my device will drop its wifi connection and when I open the wifi settings page it cannot scan/locate any nearby networks for me to join. It just kinda hangs saying that it's searching for nearby networks but it never shows me anything (even though I know there should be about a dozen nearby since I live in an apartment style building). Toggling wifi on/off does not help, nor does toggling airplane mode. The wifi settings page remains empty no matter what. The only solution I have been able to find is to do a full device reboot then everything works fine for another day or two. I've encountered this on both the google pixel slate (worst purchase ever, returned it) and a OnePlus 7pro. The behaviour has been **identical** across both devices. I've read some old articles saying to disable ipv6 support but I don't even have that option on the OnePlus phone (and honestly I wouldn't be happy if that was the solution). I'm a senior software engineer at a major tech company and I can't figure this out and I can't get any legitimate help from the companies behind these devices. What can I even do? I am open to troubleshooting suggestions or if someone can help me gather debug information to submit a more official report that would be great. Right now I have no way to get official support, the people at oneplus are just giving me the usual runaround of doing a factory reset etc without even examining the issue... and google has worse customer support than comcast.