Spline - chromium native issue - bottleneck

While loading the breathing animation on loading elements loses fps & starts freezing main thread.
That's a bottleneck issue that doesn't exist on gecko based browsers.
Either remove some elements that would cause this (debugg and check each element in spline scene) or somehow export the canvas paiting to a web worker (quite difficult & time consuming).
What's interesting is that while using the IFrame export (embeded export option) in spline the main thread doesn't experience freezes.