Welcome to the community!
Are you using this Advanced driver? [DRIVER] Zooz ZEN Switches Advanced (and Dimmers)
Join the owners group so you can post images: Hub owners - Hubitat
Turn on info and debug logging on that driver I posted above, see if the issue will reproduce and then SCREENSHOT the logs and post that please.
Also please go to Settings >> Z-Wave Details and then screenshot some of your new dimmers, if you added them all at once they should be grouped together.
