[css-scroll-anchoring-1] Should 'position: fixed' changes be suppression triggers?

[eqrion]

The scroll anchoring spec lists the following as a suppression trigger. [1]

Any change to the computed value of the position property on any element within the scrollable element (or document), such that the element becomes or stops being absolutely positioned.

In the WICG scroll anchoring explainer, I see that 'positioned: fixed' is considered a suppression trigger as well.

Is the WICG explainer out of date, or should the spec be amended to include this?

[1] https://drafts.csswg.org/css-scroll-anchoring-1/#suppression-triggers
[2] https://github.com/WICG/ScrollAnchoring/blob/master/explainer.md#flow-change-suppression