Fusion has started corrupting nesting selections. It shows that error marker and if I click on it to change the selection fusion crashes. I'm trying to nest large batches, and it is a huge waste of time to track down which part is missing, then build a new model because I can't just reselect it. I don't want to share the files, but it's happed to 10+ models and is happening more and more. This needs to be fixed.
Edit: I worked with someone from support, he was very helpful but wasn't able to resolve the issue. I have to say, its incredibly frustrating to be running into issues like this while trying to keep production going.
