An issue with responsive HTML 5 publishing

I have several tables (1 column and 1 row) with the "Title" value "Below table" in the table designer. I import images to these tables (import file > import by reference) and resize them using anchored frames. When I publish files as responsive HTML5, the space between the image in the table and the table title is different every time. 5 tables, 5 different spaces. If the title is "above the table", everything is OK. I think this is an FM bug. Has anyone have such an issue?