Cannot edit and change primitives

I can’t seem to edit any primitives unless I exit the app and come back.
Any ideas?

Screenshots saves lives.

It’s easier to see what’s happening in a screenshot than to take guesses. It couple be multiple issues (usually user error) but hard to pinpoint what it may be without seeing your scene.

Also, if it is a bug, listing your device, device version, stylus type, etc. can be very helpful to the dev. Otherwise he may be chasing an issue that is only on one specific device.