Yep, still have it, working with the workarounds I mentioned.
Android version: 7.0
Baseband Version: G920FXXU5EQB3
Kernel Version: 3.10.61
Build Number: NRD90M
Android Security Patch Level: Feb 1, 2017
Another workaround I found:
1. turn off wifi
2. open the built-in wifi app while it's still off
3. turn on wifi while already in it via the slider in the top right
4. the wifi app will now work, at least for a bit
Let us know. I talked to their online support and they weren't helpful in the slightest, just suggested cache wipe/restart, which I told them I had already done. Then they just suggested factory reset.
Same exact problem on my s6 after updating to Nougat yesterday. Tried wiping system cache, started in safe mode, problem is still there. Any ideas would be appreciated.