This turned out to be a more general problem. Any links to /new-topic
from /latest
would fail. That includes links from theme components, global notices, or banner topics. The issue should now be fixed, following:
https://github.com/discourse/discourse/commit/583226d295ea10ec548d52ac3fc3d7e99628c2eb
@thegurjyot please can you confirm that this fixes the problem for you? The fix should hit tests-passed in the next few minutes.