Again, it is unlikely that an iOS update would fix this issue but as the final option is to uninstall Tinder, we may as well try.
Pros: There's an extremely no time-wasters vibe to the whole enterprise, and you're not likely to end up doing the same thing as you always do if you hit it off with someone on the app and meet up in real life.
The most important statistics.
'Tinder Swindler' Simon Leviev Permanently Banned from Dating App
Even if this might not have a direct issue with your messages not showing up, it is still good practice to do this.
If you were already using W-Fi then you may want to switch to Cellular Data.