Having this issue only in iOS emulator and also in real device (using Ionic View). Android looks fine.
Even when using a Start Sample App (Tabs Sample with Beta 10), and just adding some content to each tab (just so it has enough to scroll) -
To Simulate -
a) Open App - App opens with first tab.
b) Now select second tab.
3) Go back to First tab and try to scroll. The scroll would not work in first tab.
The other thing I observed is that as if the scroll is attached to second tab in step 3, that is, the scroll would have moved the second tab content even though we are in first tab.
I am not sure if this is an issue with Beta 10 or if my environment issue.