You can't be gentle shifting these transmissions or you will find false neutral every now and then. It is a possibility that there could be something wore if you have a consistent issue recurring at a consistent point. If this is the first time it's ever happened I wouldn't be too concerned.
But your post confuses me. Shifting into 2nd or 3rd?? I assume you mean it was either 1st to 2nd or 2nd to 3rd and tour just not sure?? You might've been shifting from 1st to 2nd and hit nuetral? Lol