One funny thing, the components that show a problem were built in a way that presumably contributed to the issue we’re now seeing. Normally it would be difficult to ask someone to describe the steps they used to make something. It’s less of a problem when that happened on live YouTube.
That problem is not new for me, in the past somethimes i could select all component by ctrl+A, but couldn’t select by clicking on it… I thought it was the way the component created and forget about it… I can’t remember how i solved that, may be selecting with ctrl+A and explode i don’t know…
Aaron modeled the Lego pieces in meters instead of millimeters, to avoid too small geometry issues. This version of the model has gone through the 0.001 scale change to make it be life sized. If you now try to edit at that size you’re back to possible too small geometry problems.
A recent change has added a couple of new symptoms to those problems, we need to revert that change or do the change in a better way. At least we have an easy test case to show if things are good again.
Meanwhile, if you went back to the Aaron scale of working, the problems you’re seeing will go away.