It’s not fixed, but it isn’t consistently broken either in our testing - a lot has to do with whether anyone has already visited the site on a CDN node since last deploy - we’ll often cache the first thing that comes through. If the first request is for https://yourlanguagegatedsite.com/asset.png that will likely work, but if it’s for a path that would require a redirect, that redirect may get cached instead.
The fix you’ve implemented will work either way - whether it happens to work as you’re hoping, or not 