I have the similar issue.
In iOS and Browser the performance is OK
But In Android The performance is too slow after switching 3 to 4.
I have a view with 4 tab Childs that includes ion-lis of cards.
The ion-list’s scroll and tab switching is too slow.
And the more modal popup in the tab child view work not good.
I need to touch the row two or three times to popup modal custom view.
And one more , in android modal popup up break tab child’s scrollable-view(ion-scroll). so I changed it to infinite loop.
But in IOS ion-scroll and modal popup woks fine…
If anybody have some hint, please let me know it.