Why in io 11 when you click on a button with an icon, the icon twitches?

Question

css

Hello. Actually the question is in the title. All parameters of the button are reset, such as stroke, indents, etc. Svg icon inserted via svg symbols. When you click on the button, the icon seems to slide down. Sleep doesn't have that.

Answer 1

$("img, a").on("dragstart", function(event) { event.preventDefault(); });