Gump's Level-up messenger display problem

I'm starting a new topic rather than posting in the script thread, as the scripter hasn't been on site since the middle of May and isn't answering queries.

The script is here: http://forums.rpgmakerweb.com/index.php?/topic/20500-gumps-level-up-messenger/

The problem is that if the battle in which you level up is followed immediately by dialogue/cut scene, the level up message screen stays displayed until the end of that dialogue/cut scene, and so obscures what's going on (as well as being annoying). There are 2 methods in the script for the display screen to finish, either action bar or a length of time. Neither operates while the dialogue is happening.

Can anyone see a way of removing the screen so that this doesn't happen?

Thanks.