Why is the SVG restart attribute being ignored by Safari?

Question

JavaScript

Hello!
Guys, the svg line with animation is rendered on click. So that when generating new lines, the old ones are not re-animated, I set the attribute restart with the value never for each.

lineAnimate.setAttribute('values', '0; 1; 2; 3; 4');
lineAnimate.setAttribute('keyTimes', '0; 0.25; 0.50; 0.75; 1');
lineAnimate.setAttribute('dur', '500ms');
lineAnimate.setAttribute('begin', 'canv.mouseup');
lineAnimate.setAttribute('fill', 'freeze');
lineAnimate.setAttribute('restart', 'never');

The code executes perfectly everywhere except Safari and any browser on iOS: when a new line is rendered, ALL previous ones restart their animation. What to do?