are you using any other cache engines, like memcached or anything like that?
I was kinda looking that it might be that
You'd have to specifically configure them, in your YML
And if that doesn't work. I'd look at disabling cache include and the elastica modules
If you can at least track it down to a module, that's a start
yeah, along those lines, start removing modules until you find the one that breaks it
I'm guessing cacheinclude, but I'm a bit puzzled by the queued jobs involvement
this weekend is going to be painful