That happens from small clips to midi bouncing, when theres sm automation or processing like event fx...
The 'Time remaining' value keeps increasing, n when i go for cancel it just doesnt and S1 crashes.
What in the hell.

 

That should be caused either by a plugin which doesn't supports multi-core processing but it still features an internal oversampling which is handled just by a single core
which makes that window behave like the time is increasing, OR there must be a bug with Studio one and you need to update or reinstall it.
I had a similar problem, but only randomly with the 2.5 version, not all the time, while 2.6.3 seems to work great, at least to me.
Some people might not face this kind of problem at all though.

 

yea it happens randomly, i found a solution: i export the stem in real time and tick the box 'Insert Stem to song'...i dont think absynth has that multiprocessing prob though..i have the newest version so ill wait till an update by presonus or ill just reinstall...thank you for your help