We have an older Brother printer - and the WiFi is just not reliable on it. Tried it on several different access point models. No firmware update from Brother. We are going to replace that printer once the ink cartridges have run out. Unfortunately, we don't print very much now, and that process has been taking a very long time.
A real common issue with Windows 10 is drivers. Take a user that is having the issue repeatably and make sure their WiFi driver is up to date. Note that some manufacturers (like HP, Dell, etc) don't always provide the most recent driver through their own update systems, and you might have to go to the actual WiFi NIC manufacturer to get the driver.
Another common issue with Windows 10 is power saving. On some affected users, try running these commands to disable WiFi power saving:
@Cabimas66 you might want to upgrade the firmware, 25.13 is very out of date, we run our MRs (including 30+ MR42s) on 28.5. If you don't like running a release candidate then 27.7.1 is still a lot newer than what you are running.