White bars when using Chrome landscape mode on iOS (or Natively)

Hey

Has anyone experienced this and found a solution? My app has white bars on the sides, when viewing it in Chrome on iOS landscape mode or when embedded to Natively.

I originally had it in mobile Safari also, but when I added this:
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no, viewport-fit=cover">
if fixed it for Safari.

In Chrome/Natively however the problem is still there.

Any help is greatly appreciated!