I updated my signature today and now on my yobit account under
Amount BTC I am getting zero. Anyone else having this issue?

I also have a problem. There are my posts that are not counted. There seems to be an error in the system of posting calculations after using a new signature. Or could there be a new rule added?For your problem, there are a number of my friends who have experienced it and they are currently discussing it on our community telegram channel.
I think we have to update new signatures code before going to make a post count in yobit bot because I have make two posts before updating new signature code those posts are not counted by yobit bot. But after updating signature I posted few more that was counted by yobit bot so all signatures campaign participants need to change the new signature code before going to make posts.