Are there any known bugs with the Billing application (version 20.3.1)?  We have two people doing Contract-based billing each month and we have had a few times where we get a "fatal error" or an invoice posts that is the incorrect invoice... or a selected invoice generates and then when we view the printout it's for the wrong job/customer than what was selected.  We've used multiple people in the Billing application for YEARS and have never had the issue that we've had the past few months.  Is it just us?