Have to disable Multicore support in order to freeze tracks

[redvex]

With Multicore / multi processor support on I'm unable to freeze tracks.

The loading bar goes up to 50% and never goes further.

I discovered by turning it off it fixes the problem and I'm able to freeze tracks just not with multi core support on.

I'd like to have multi core support since I have quadcore processor but currently I can't because of this issue

Specs are

Ableton 9.1.4

Mac pro
3.7ghz core i7
64gbs of ram
256gb ssd with read and write speeds of 1gbps

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That is not normal at all, contact support.