MrsKirky Said:
"How to keep capslock on in iphone: My enable capslock in keyboard settings was disabled, but now doubletapping works again. GOOD GRAVY”
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Thank you for the screenshot.
Troubleshooting Double-Tapping:
Interesting. You may have inadvertently changed it. Unfortunately, there is no way to knowing of your prior tapping of the keyboard, as the iOS keeps no record of this.
Restore from a Backup:
Restore your iPhone from a backup of it that was made prior to this occurrence, and all would go back how out was configured when the backup was made. So, backup items prior to restoring them (i.e. enable Photos in iCloud Settings
or eMail items to yourself). Note that downgrading the iOS is not an option, as of this reply.