Just installed SS3 on my server - no problems with it.
However, in the CMS Admin I am setting up my page structure and I'm getting some issues...
I have a page which contains sub-pages (child pages).
When I Save & Publish the Parent page the sitetree reloads and the "dropdown / expand" arrow to the left of the page briefly appears, then disappears, so I can no longer access the child pages unless i reload / flush the admin.
Its driving me crazy - please help! Making things pretty unusable...
I'm not sure if I've explained this well, so see screenshot below!
Did you ever find a solution to this? I'm experiencing the same problem of certain sites and can't figure out what's causing it. Appearing in both 3.0.0 and 3.0.1. Checked the bug ticket and the Github thread but didn't find anything there.