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Maurice
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The satellite toggle has worked on Leaflet for as long as it has existed and did nothing at all on a GL map, which is the default renderer since the vector basemap landed. Not for want of the layer: connect-src never named server.arcgisonline.com. Leaflet asks for a tile as an <img>, and img-src waves every https: host through, so the gap could sit there unnoticed for as long as Leaflet was the only renderer that showed the imagery. A GL map reads the raster through fetch to hand it to WebGL, and that lands on connect-src instead, where the host is missing. The browser refuses it in the document, which is the worst shape a failure can take here: the switch flips, the layer goes on, the source is there, and no tile ever arrives. Nothing in the app can see it either, because a CSP refusal is not an error the fetch can catch. The prefetcher asks for the same tiles the same way, with mode 'no-cors', which relaxes CORS and not CSP, so the imagery was never cached for offline use either. Same shape as #2180, which added the other two raster presets for exactly this reason and did not reach this host.