I have a TP-Link TL-WR802n mini Wifi AP. Setup is with an WPA2 key. However when it boots it has an unecrypted wifi under the choosen name for a few seconds. If raspi is powered up before the wifi router, raspi 3 just crashes, the mouse can't be moved anymore.
If AP was booted completely and then raspi 3 is turned on, everything is fine. If I then disconnect the AP from Power and turn on again, the raspi toolbar at the top of the monitor freezes. Time and CPU usage doesn't move forward anymore. The startmenu doesn't appear upon clicking. The mouse can be moved and icons on the desktop can be used. I think raspi is confused because the wifi is for a few secons unprotected.
An Raspi with stretch lite and manual wifi setup works flawlessy (with another router), so how can I disable the wifi management by the GUI? I think with disabling raspi will be more stable.
EDIT: After a short time it is also unusable.
EDIT: Tested with another PI3, just put the SD Card into it, same problem. It crashes right at the moment WIFI AP comes up.