Hello clord71,
Since you still have an issue, and it seems to be related to your Wi-Fi controller, we recommend reinstalling iOS.
Before reinstalling you should make a backup of your data. You can make a backup in iCloud or Finder/iTunes using this article: How to back up your iPhone, iPad, and iPod touch - Apple Support
After your data is backed up, you can reinstall iOS using your computer. The reason we need to use the computer for this step is to get a new copy of iOS installed to your device. Use this article to reinstall the iOS: If you can‘t update or restore your iPhone, iPad, or iPod touch - Apple Support
Please pay close attention when you reach step 4. Once iOS is reinstalled, test if the issue is still occurring.
Thanks.