Something like the safari failed to draw some elements suddenly. JS reported it is there. Query the size with js do work. Select it with devtool works. The only

Something like the safari failed to draw some elements suddenly. JS reported it is there. Query the size with js do work. Select it with devtool works. The only thing not work is... the element is invisible. Hide and show the element again makes it show correctly. But how do I know whether it is bugged now without guest the browser from user-agent?