[bug?] "weak security" warning on iOS 14.6 is incorrect

The Wifi settings on my iphone claims my router is set up to use WPA/WPA2 (TKIP) except it isn't. It is using WPA2-PSK AES. See the screenshot below of my TP-link Archer VR600 settings.

I've confirmed this with someone else using different hardware (a vigor router) and they see the same thing with their ipad: that iOS is incorrectly stating a wifi connection as "weak security" when it isn't.

Is this a bug? I'm pretty sure I didn't see this iOS warning when I set up the router three months ago.