MutableDictionary<String, SkImage> crashes

I noticed that SkImage in general is crashing VL.
In particular, I was tended to use DrawImage, so I cached first my images and was ready to use them by a mutabledictionary.
In my very first attempts I noticed that DrawImage couldnt also be cached (it was crashing) so I brought it out and putted it in a separated foreach loop.
It was working till my next restart (F8->F5) and after this I realized that every time I was checking the SkImage tooltip VL was crashing.

Where do your images come from / what nodes produce them?