Unwind: “Sticky” header misbehave and covers content

Hi,

After updating to the last version of Unwind available, the sticky header has stopped to work properly, starting to cover the first area of the content in the page (post/page headers, search bars…), no matter which bottom-margin is set for the sticky bar css property. Curiously, when the header is fixed on the top, this is not happenning, and the header respect the content.

Could anybody help me to resolve this issue? Thank you,