[scroll-animations] Possible infinite loop with element-offset

[noamr]

In https://drafts.csswg.org/scroll-animations-1/#element-based-offset-section
The timeline of the animation is decided by (roughly) the distance between the viewport edge and an element's edge.
However, the animation itself can affect that edge - e.g. if it's animating the height property.

So, if I'm not missing something, there could be a situation where the progress of the animation flickers endlessly.
This is already the case with hover pseudo elements (hovering on an element might cause a repositioning that would change the hover state).
Is this a problem? Maybe somehow the algorithm already deals with it?

[flackr]

The ability to cause cycles is explicitly called out in the spec here. In particular we avoid tight layout cycles but it is possible to construct an animation which flickers frame by frame like with hover.