@tian @DBailey635 @eliaspereira Apologies for missing this post. This was fixed in August-ish of last year, see also:
https://github.com/FOGProject/fogproject/issues/736

I found this searching for a post I wrote about it, as I’m pushing another fix for this for a bug just found in 1.5.10.x

If you update to the latest dev-branch (or what will be stable on the 15th of this month) or give the working-1.6 branch aka 1.6-beta a try, you’ll find the queuing problems fixed.