possible timing problem with long patterns

hi i have renoise 2.8.2 and i found a bug in long pattern of 32 64 128 256 legth of boxes there is something delay in beat sequence and metronome in a log pattern have any delay i create some track whit long patter resultadet bad quality of entire track and so i dont forgive i found it sistem whit short pattern whit 16 boxes for pattern

resultated good step alghorithm on all track and change metronome because i try a loop application and i hear a good step alghorithm can help me please for tell me what is that problem need more cpu?or what is?i wanna work whit that short pattern step on all long pattern.try it whit metronome on a short pattern and long i hear difference thanks