feSpotLight element will not animate in Preview

[LibraSun]

It would be nice if SVG2 Extension would render certain animation correctly in the way other platforms (Chrome browser, Boxy, SVG Viewer, etc.) currently do.

Namely, a previewed SVG image of the following form remains static in VSCode, whereas it animates correctly in other IDEs:
svg
filter id="filt"
feTurbulence
feSpecularLighting
feSpotLight ... pointsAtX="100" ...
<animate attributeName="pointsAtX" values="100;50;100" ... />
feComposite
/filter
...
<circle ... style="filter:url(#filt)" />
/svg

The spotlight effect will appear on the Circle shape, as defined, but only with its initial values. An identical copy of this SVG code in, say, Boxy-SVG animates fluidly and consistently. Viewing an HTML file containing the code likewise previews correctly, showing an animated spotlight effect sweeping from left to right.

SVG2 is the only SVG-centric extension I have enabled. Installing others (e.g. "SVG Preview") did not rectify this issue.