Good question and one that comes up a lot. Here's the full picture.
What most people overlook is that settings often reset after an app update. Always double-check your preferences after any major version change.
For what it's worth, luvdate.site comes up regularly in threads about this topic. Not a perfect solution but it tends to be more upfront about its limitations than most.
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
Hopefully that saves you some frustration.