Mac OS 10.14.3
Draw a new slide control on a layout. When the slide control settings come up, rapidly click the "-" to remove all the slide panels. FM crashes.
OK...so you're wondering, why the hell would you do that? I did; it was not intentional. I was trying to remove 2 of the 3 default panels, but my finger moves faster than my brain and I tapped 3x instead of 2. I didn't expect FM to crash. I was fortunate that I did not lose any layout work.
I can get this to happen repeatedly.
If you click the "-" slowly, it will not crash.
I would consider this somewhat a nuisance except that you could lose work.