Gaps in ABS print

I have weired behavior on my S1 for the first time. I get some gaps in the part which I havent had bevor using the same fillament and settings

I am printing quite standard with 230 degree, 60mm/sec, no cooling, bed 100degree. I have tryed with 250 degree and its not getting better.

What could it be? I have printyed a lot of this part only 30mm high without problems

Anyh help greatly aspprechiated