Not an API bug. You're not even using the API there.

The situation here is that the action=delete check is using a fast estimate for the revision count instead of actually counting. It may be that it could instead share the cache from action=info; I'll leave that determination to people more familiar with performance.

I have worked on this very briefly: https://gerrit.wikimedia.org/r/131264

But it needs more love.

gerritadmin wrote:

Change 131264 had a related patch set uploaded by Hoo man:
Don't estimate the revision count for page deletions

https://gerrit.wikimedia.org/r/131264

gerritadmin wrote:

Change 131264 merged by jenkins-bot:
Don't estimate the revision count for page deletions

https://gerrit.wikimedia.org/r/131264