I guess i know what's causing this, will fix it in next ver.

You guys get a job timeout before this, am i right?

Are you setting it manually in pools config?

If not, can you try to put "job_timeout" : 900 , that is 15 minutes, and test to see if you still get timeouts and invalid job rejects?

If no timeouts i will know this was the problem
thanks

example:

pools.config

{
"pools" :
[
   {"pool" : "xmr-eu1.nanopool.org:14444", "wallet" : "4A5hJyu2FvuM2azexYssHW2odrNCNWVqLLmzCowrA57xGJLNufXfzVgcMpAy3YWpzZSAPALhVH4Ed7x o6RZYyw2bUtbm12g.donation", "password" : "x", "job_timeout" : 900}
]
}