One particular client, suddenly is missing triggers and procedures, seemingly with no cause.

Procedures get replace with:   BEGIN EXIT; END

Triggers get replaced with:   AS Declare variable I integer; BEGIN I = 0; END

The database does not appear to be corrupt in anyway and validates fully with no issues.  I have backuped/restored, replaced the missing procedures and returned to the client only to find out today the triggers/procedures are missing again.

Can anyone enlighten me on why these might disappear, but not only disappear be replaced by empty procedures?  Where can I look for the cause?  My application does not alter the database DDL it only does CRUD type operations.

Thanks.