Every 3-4 ajax refreshes, the build queue shows fewer jobs (right now it goes from showing 88 builds, to only 3 builds). Problem is since upgrade from 1.523.

It's interesting to note that the bad requests (the ones that received a response in under 50 ms in the pic below) show

collapseBuild Queue
No builds in the queue.

and not the 3 jobs you can see in the interface.