Hi there! My name is David. It’s a pleasure to help you today.
The issue may be due to incomplete compatibility of the Intel AC 9260 wireless network adapter with WPA3 in Windows 11.
What I would suggest is trying to configure your RS600 router to allow WPA2/WPA3 (Mixed/Transition) mode. This way, some devices will use WPA2 and those that support it will use WPA3.
You can check how to perform this configuration by requesting assistance from your router’s manufacturer.
After making the configuration on your router, delete the network from your PC and reconnect from scratch.
Go to Start > Settings > Network & Internet > Wi‑Fi > Manage known networks, then find your router’s network and click on Forget.
Regarding your question: the “connect automatically” option is only used for already saved networks, meaning the system will not automatically connect to an unknown network unless you have previously connected to it.
Let me know if the shared information has been helpful. Regards.