Crash/page reload on mobile a the end of a FlyTo animation

[DDDgfx]

I have a project you can view here: https://toclimbdev.wpengine.com/

Im using flyTo() to move about the map and - on mobile only - the page crashes and reloads at the end of my flyTo() - I also have an isolat4ed version of this project here: https://dddinfographic.com/bt1rwanda/ and it does not crash on mobile....

I'm wondering if having "essential : true" could be the culprit and that maybe in conjunction with the other elements of the complete site, the mobile browser is running out of memory

Is it best to not use this setting on mobile?

map.flyTo({
    center: [30.097696175948585, -1.9653736581438466],
    bearing: 0,
    pitch: 0,
    duration: 10000,
    curve: .1,
    zoom: 10.897333284760252,
    essential: true. // does this significantly impact mobile performance?
});