authcache_debug always shows MISS when returning a HIT from authcache_varnish

When testing the latest dev release of authcache and authcache_varnish, I've given cacheable roles the ability to see the authcache_debug block. I am logging in as one user in a browser and loading a page, then logging into a different browser as a different user and viewing the same page. The debug block always returns a cache MISS and not a HIT. When looking at the response headers, it's clear that it is a cache HIT from Varnish based on the IDs in the X-Varnish header as well as the X-Varnish-Cache header. Thanks in advance!