The problem is you have at least 3 different APs all on the same SSID. All are on different channels and one is so far away it doesn’t work well. Since the Wi-Fi code is mostly looking at SSID, it apparently sometimes gets confused and picks the one that is farthest away. This is what is causing problems. Eventually it figures this out and picks the closer one. I have different SSIDs for my house and barn that 70-80 meters apart. When I walk from one to the other my phone will stick with the same one until it is so weak it really has to switch. With the same SSID it would probably switch sooner, but this can be good or bad.
If you create a new network with only a single SSID, that is close but not too close, and that is the only network it knows about, it will stick to it and likely work better.