Manifest random error (undefined e[r].call)

Hi,

I am using mix (v5.0.9) to build my frontend assets with the vendor 'extract' option enabled. The manifest file very rarely changes, if ever so it's never busted. But at random times, it just stops working until I manually delete the cached version (even if the cached version is EXACTLY the same). I couldn't identify anything that triggers it, it just seems completely random. The error and call stack are not helpful either. When it happens, the whole app just doesn't work, so it's not something I can just ignore. Have anyone encountered this before? Any ideas?

I am using Cloudflare as a CDN with RocketLoader enabled if that's in any way related.

TypeError: undefined is not an object (evaluating 'e[r].call')
  at l(/js/manifest.js:1:560)
  at bUC5(/js/app.js:1:56521)
  at l(/js/manifest.js:1:565)
  at ? (/js/app.js:1:1274)
  at l(/js/manifest.js:1:565)
  at t(/js/manifest.js:1:431)
  at r(/js/manifest.js:1:294)
  at global code(/js/app.js:1:51)