Versions section will sometimes not open

1.0-alpha0

What did you do? (clear steps if possible)

• open an app's details
• click Versions

What did you expect to see?

• a list of versions scrolling vertically

What did you see instead?

• the view scrolled a bit up
• the arrow changed from pointing down to point up
• no list of available versions was shown
• retried and now I got a list

I can't repro this at will, it just happens sometimes.