I recently reported a bug on IRC about parameterized quite periods and delays, where Kohsuke fixed it such that buildWithParameters?delay=30sec now works as expected.

However the quiet period is still ignored. The "Build now" button doesn't respect the quiet period but this is perhaps expected as it uses "delay=0sec", but also hitting the /build URL and entering parameters, or setting a "Build periodically" for "* * * * *" will result in the build being executed instantly every minute.

This was confirmed on a fresh 1.360 Hudson instance with both the system quiet period and project-level quiet period.