Seems like the only overt thing that sticks out is the plague. But if its a Nurgle related plague then there's almost certainly Nurglite cults festering. So this is definitely another crisis we need to address before Chaos related shenanigans overtake them.Oh boy time to blast these silly people with a "WHY THE FUCK DID YOU GO INTO THE WARP WITHOUT A GELLER FEILD?!?" Speech, this is going to be fun…and did anyone see much chaos fuckery besides the plague?
Also, are these aliens using something like the Tau's warp skimmer drive? Just that they don't have the expertise to consistently 'skip' between reality and the Warp so they momentarily 'dip' into the Warp every so often.