There seems to be a major change in asset handling: In the new version assets are outsourced to cloudfront (see screenshot). And this seems to cause some probelms with Vue.js’ internal asset handling:
hi there, are you using absolute paths? if yes, then that might explain why.
If you have asset optimization turned on on netlify, then the relative path will stay the same (just be served through cloudfront) but the absolute path will change.
if you don’t want to change the paths in your app (and you have narrowed down that this is the cause) you could switch off asset optimization and redeploy, and the absolute paths will still be valid.