Update: I was also able to replicate the #1, so I’ll create an internal report about it. It seems that I can replicate it in Chrome, but not in Firefox, where I was testing first time
We’ve addressed this in Bricks 2.4.3, now available as a one-click update in your WordPress Dashboard.
This addresses the blue canvas selection when rapidly deleting the last component property. The separate parent-layout border issue is outside this fix.
Please read the changelog entry before updating, and let us know if you experience any issues.