Patches of Hair Disappear After a Few Seconds

HeavensDisciples

If I add hair to a model, it appears just fine for a few seconds; then patches of hair disappear from the model just after those few seconds.

Does anyone know what could be causing this? I'm using Marcus for Genesis 8 and Shaved Side Dread hair.

EDIT:

I saved, closed, and reopened the file and he same thing happened again. The hair appeared fine for 10 to 20 seconds only.

SOLUTION:

I've found a work around for this issue for anyone that encounters this problem:

• In the [Scenes] tab, highlight [Marcus].
• In the [Parameters] tab, go to [Marcus > General > Mesh Resolution] and under [SubDivision Algorithm], change the drop menu value from [Catmark] to [Loop].