I did a shop earlier this month and got an email saying my completed shop had been forwarded to the client. So, when I got a generic offer today from a scheduler to do it again. I checked my ACL history. The shop was missing. If I had not gotten the offer today, I might have missed the fact that the shop was missing and not get paid.
Other shoppers may want to check their Completed Events tab, just in case this was not a one-time glitch.
I used online chat. ACL will investigate this.