Unable to scroll after swiping back to previous page

[r0mnic]

Occasionally when returning to the home feed after opening a post, I’m unable to scroll until I switch to a different pane (search or settings etc)

[aeharding]

Hi, thanks for reporting. Can you let me know device and browser? And please let me know if you determine a consistent reproduction.

[r0mnic]

Running on Safari on iPhone 12 mini. I’m running the IOS 17 beta so it could be specific to that.

[aeharding]

OK, great! I have a 13 mini so I'll keep an eye out.

[aeharding]

One thing I have noticed potentially related to this, is that if you swipe back and then try to swipe down quickly after, it sometimes "captures" your swipe events until you wait >1 second without interaction. Then you can swipe down the feed again.

[PawanHegde]

I can reproduce this on iPhone 12 running iOS 16.5.1. Seems to happen if i try a swipe very soon after finishing the first one.

[aeharding]

I'm going to assume that this is just the bug where scrolling gets temporarily "stuck" trying to swipe down a feed after quickly swiping back from a post/etc.

I believe this is an Ionic bug. Still need to see if there's an existing upstream issue.

Edit: Testing further, it doesn't appear to happen on Android. I thing this is just Safari being Safari :/

[MarkLindsay]

For me, when scrolling stops working I engage a swipe gesture and then scrolling works again (like an up vote swipe, but you don’t even have to complete the gesture). Don’t know if that helps.

iOS 16.5.1, iPhone 13 Pro

[snickell]

I've been trying to track this one down. I'm on an iPad.

I've only been able to intentionally repro (when connected to a mac to get access to devtools) a few times after a lot of trying, but I suspect it may be caused or related to not clearly visible text being selected. Doing a careful "deselect press" in a blank part of the page consistently freed me from the lock.

Selecting text in the header (e.g. selecting the "Back" link/text) seems to (in ??? circumstances) cause a similar behavior... somehow further scroll and click events?

[aeharding]

Related:

https://bugs.webkit.org/show_bug.cgi?id=222654

https://github.com/ionic-team/ionic-framework/issues/23001

[aeharding]

This is resolved with the native app. Because there is an upstream bug for Safari regarding the PWA, I'm closing this out :)