Cache not invalidated on push

[Richard Copley]

After a push, browsing my cgit instance doesn't reflect the latest
changes, unless and until I clear (i.e. delete) the cache directory.
Is that expected? Can cgit be configured so that it's up to date after
a push?
The repo is simple with no branches other than the default. As for
hooks, it has just the standard post-commit hook (which calls "git
update-server-info").