Hello,
Are you noticing this situation with all preets or just one? Did you check the "effect routing" to see where the reverb was located and if it was in the signal chain? If it is, you will want to perform a "reflash to set the unit back to factory presets:
Vetta Software Update/Reflash Procedure
http://line6.com/community/docs/DOC-3762
Please let us know if you need further assistance, and close out the ticket as “answered” if your situation has been resolved.