Not a bug, but a request:
It's rather difficult to grab a point when it's in the lower right or lower left of an AI. There's 4 possible zones here and they are
really close together.
A large part of the issue is that the cursor changes make it difficult to know where the cursor is pointing so you can adjust to find the envelope point.
I do not have a suggestion for how to improve this, but it's been very annoying to deal with when using AIs in actual production.