I had this issue a few days ago with the Foliage Feature. I planted and draw some Foliage on my Terrain and had the idea to save the settings as “InstancedFoliageSettings object” and later on I closed my Project. Then again when I tried to start the Project again I either seem to have forgotten about to save the Settings File, or it didn’t sdave at all (I’m not sure about that), but I wasn’t there anymore and I recieved an error. Now everytime when I wanted to click on Foliage to maybe delete the settings file or so It would automaticly crahs when I click on Foliage and there seemd to be now way to get out of this situation and Foliage was unusable for me.
Lucky I found out when clicking on the Error Message I was able to select the Foliage and delete it.
So it was kinda fixable but the outcome was that every Foliage I placed was now gone (which isn’t a big deal since I hadn’t build anything big with it yet) but still that seems to be a small issue which should be addressed. Rather than crashing it should give you an error and set it back to default values or something.