Cannot combine multiple filters (ISO country codes) - mapbox-gl-js

Question

I followed this tutorial to highlight countries on my Mapbox map (using the Mapbox Countries v1 vector tileset). However, some countries seem to be highlighted twice (i.e. their shading is darker).
Here's my map right now:
As you can see, China, India, etc are a more vibrant color than the other countries in Asia. (This is also a phenomenon in the Medium post, as you can see in the third photo in the "Add a layer" section.)
Here's my code:
map.addLayer({
id: 'country-boundaries',
source: 'country-boundaries',
'source-layer': 'country_boundaries',
type: 'fill',
paint: {
'fill-color': palette.blue.flats,
'fill-opacity': 0.4,
},
filter: [
'in',
'iso_3166_1_alpha_3',
...highlightedContinents.reduce((countries, c) => {
return countries.concat(...ContinentRegionDefinitions[c].countries);
}, [] as ISOCountry[]),
],
});
and the array being returned is just a list of 3-digit ISO 3166-1 codes (['AFG', 'ARE', ...]).
I believe the problem is that I'm showing all worldviews, so countries with disputed boundaries are being shown twice.
I can change the filter from being the country codes to filtering by worldview (see bottom of docs page for sample code):
filter: [
'any',
['==', 'all', ['get', 'worldview']],
['in', 'US', ['get', 'worldview']],
],
and I get this, where almost all (except the circled) are only highlighted once:
Now, one would assume that, to get what I'm after, I could just combine these two filters like so:
[
'all',
[
'any',
['==', 'all', ['get', 'worldview']],
['in', 'US', ['get', 'worldview']],
],
[
'in',
'iso_3166_1_alpha_3',
...highlightedContinents.reduce((countries, c) => {
return countries.concat(...ContinentRegionDefinitions[c].countries);
}, [] as ISOCountry[]),
],
]
but for some reason that doesn't work:
(I've tried removing the ...highlightedCountinents.reduce(...) part and just replacing it with a short, static array, but that didn't help.)
Any thoughts? Is my filter wrong?

Answer 1

If anyone else stumbles across this I managed to get this to work with the following filter:
let masterFilter = [
'all',
['any',
['==', 'all', ['get', 'worldview']],
['in', 'US', ['get', 'worldview']],
],
['==', 'false', ['get', 'disputed']],
['any', ['all', ['in', ['get', 'iso_3166_1_alpha_3'], ["literal", countriesToShow.flat()]]]],
];