Preloading maptiles for camera animation stopped working

[crunchwrap89]

mapbox-gl-js version: 3.9.3, also confirmed in 3.6

browser: Chrome & Firefox confirmed

Steps to Trigger Behavior

1. Add a mapboxgljs map
2. Preload maptiles and await idle before running flyTo.
   Code example:

map.flyTo({center: [-119.5375, 37.7425], preloadOnly: true});
await map.once('idle');
map.flyTo({center: [-119.5375, 37.7425]});

Expected Behavior

Maptiles should be preloaded before animation starts for a smooth animation.

Actual Behavior

Animation runs instantly, tiles are not preloaded. Resulting in a laggy animation.
The lag is more visible on a less performant device, such as a mobile phone.

[underoot]

Hey, @crunchwrap89! Thank you for your report!
Could you share a minimal reproducible example in the service like https://jsfiddle.net/. It will help the team with the investigation.