Cr2.6.0 Crash on sample after setting cache

Hi, I have CrossDJ crashing in the following situation.
pre: Cache =0%
When creating a sample (click on pad 1 of deck C, size=4) it tells me 'not enough cache..'
I increase cache to like 20% (of 8gb)
Click on pad 1: crash.
When first increasing cache and then create sample it works fine.
In the manual I cannot find that cache=0 is not possible for creating samples, so I do not know if it is a bug or something worthwhile adding in the manual.
note: using W8.1
pre: Cache =0%
When creating a sample (click on pad 1 of deck C, size=4) it tells me 'not enough cache..'
I increase cache to like 20% (of 8gb)
Click on pad 1: crash.
When first increasing cache and then create sample it works fine.
In the manual I cannot find that cache=0 is not possible for creating samples, so I do not know if it is a bug or something worthwhile adding in the manual.
note: using W8.1