I'm recording some unquantized keyboard parts with beta4. Two times during this session, renoise chose a line too early for placing the note event. Unfortunately, I can't really say what I did different those two times. Also did some unquantized parts yesterday with different instrument, didn't have a problem then..
Some relevant info:
renoise 3.1 beta4 32-bit linux
debian linux with kernel 4.3
instrument is multisampled renoise native instrument, in mono-mode (instrument->midi->mono)
the instrument yesterday (no problems) was loomer aspect plugin
in both cases I was playing on every other line (1/8th notes)
And no, I'm not that un-precise.
This is really, really bad.