zdnet[.]com/article/serious-wi-fi-bug-can-break-your-iphone-but-heres-how-to-protect-yourself/
Software engineer Carl Schou discovered that a specific network name -- %secretclub%power -- can completely disable your iPhone's ability to connect to Wi-Fi. And beware, because things cannot be restored back to normal by rebooting the device or resetting the iPhone's network settings.
Go to Settings > Wi-Fi and make sure that Auto-Join Hotspots is set to Ask to Join or Never on your iPhone (and iPad).