In theory, resetting the parameters only affects your FSRS settings — not your review history.
So if it hasn’t been long since you did that, you can simply click “Optimize” again and see if the issue resolves.
Another option is to restore a backup from before you reset the parameters.
Keep in mind that this will cause you to lose all review progress made since that backup.
Here’s a guide on how to do that: How to Restore from Backup