I see the ‘fill pattern’ in the cell preview properties, but I can’t change the fill style (like picking a different fill pattern - for example, choosing other lines) :
Sorry for the delayed response. QA team has confirmed that his behavior is a bug. It is now registered and we are already working on it. Thank you for the report.
I see it has been a couple of months now since this was posted and I am having a similar issue. Is there an estimate as to when the bug might be resolved? I am also trying to add a fill pattern using conditional formatting.