Slider Widget & Ken Burns enabled - Content disappears on iOS devices

## Prerequisites

- [X] I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
- [X] The issue still exists against the latest stable version of Elementor.

## Description
When creating a slider with Elementor, adding a picture and apply Ken Burns effect, on an iPad / iPhone the slider title and button disappears shortly after each slide change. When disabling the Ken Burns effect, everything is OK.

Demo: [https://ph-internet.de/slidertest/ ](https://ph-internet.de/slidertest/ )
First two slides are setup with Ken Burns, 3rd one without. Only on the 3rd one, the title and button stays after slide change.

## Isolating the problem

- [ X] This bug happens with only Elementor plugin active (and Elementor Pro).
- [ ] This bug happens with a default WordPress theme active.
- [ X] I can reproduce this bug consistently using the steps above.