If after updating your iPhone to iOS 14.5, you notice that the WiFi network disconnects for no reason or does not connect properly, follow these steps.
The first option is always to restart the iPhone. To do this, press and hold the volume up button and the lock button at the same time. Then slide to turn off. Check if the network connects properly.
Another option is to forget the WiFi network that is giving you problems on your iPhone and re-enter the password. You just have to go to Settings> WiFi and search for the network . Then click on the 'i' icon that appears just to the side. Then select Skip this network. Turn off the WiFi and restart the iPhone. When starting, search for the WiFi network and enter the password.
If the problem persists, reset the network settings. This will erase all records to their factory state. You may lose previously linked Bluetooth connections , as well as the WiFi networks to which you have connected (you will have to re-enter the passwords and link the bluetooth devices). Don't worry, the rest of the information on your iPhone will not be deleted.
To reset network settings go to Settings> General> Reset> Reset network settings.