Preloader animation not working on iOS 15.4

[maitto]

Describe the bug

Opening the documentation example for preloaded with iOS 15.4 or MacOS 12.3 with Safari 15.4 shows the indicator without any animation, same with the implementation in our mobile app. https://framework7.io/docs/preloader#examples

Only the Android and desktop examples show the animation moving on the platforms mentioned above.

To Reproduce

Steps to reproduce the behavior:

1. Go to https://framework7.io/docs/preloader#examples on iOS 15.4 device
2. Open iOS example

Expected behavior

Loding animation moves

Actual Behavior

Loading animation is frozen / does not move

[happyendin]

same issue on iOS 15.4, is there any block by wkwebview upgrade?

[l0gg3r]

experiencing same issue on iOS 15.4