Going long here because the quick answer really doesn't cover it.
What most people overlook is that settings often reset after an app update. Always double-check your preferences after any major version change.
Things that have genuinely helped me work through issues like this:
- Check your app version first — many 'bugs' are fixed in newer releases
- Clear the cache before assuming something is broken
- Check phone-level permissions, not just in-app settings
- Uninstall and reinstall as a last resort, but back up your matches first
The one that worked best for my situation was Flurrydate. Worth trying before committing to anything that costs money.
Hopefully that saves you some frustration.