Code:

function draw(ctx) {
  const dx = 50;
  const dy = 100;

  ctx.fillStyle = 'red';

  ctx.beginPath();

  ctx.moveTo(5 + dx, 2 + dy);
  ctx.lineTo(7 + dx, 0 + dy);
  ctx.lineTo(3 + dx, 0 + dy);
  ctx.lineTo(0 + dx, 1 + dy);
  ctx.lineTo(6 + dx, 0.3 + dy);
  ctx.lineTo(5 + dx, 2 + dy);
  ctx.closePath();

  ctx.moveTo(0, 0);
  ctx.lineTo(200, 0);
  ctx.lineTo(200, 200);
  ctx.lineTo(0, 200);
  ctx.lineTo(0, 0);
  ctx.closePath();

  ctx.fill();
}

function createCanvas(id, size) {
  const canvas = document.getElementById(id);
  canvas.width = size;
  canvas.height = size;  

  const ctx = canvas.getContext("2d");
  draw(ctx);
}

createCanvas('demo300', 300);
createCanvas('demo200', 250);



<canvas id="demo300"></canvas>
<canvas id="demo200"></canvas>

Bisected to r568155 = df18b96b443774d232e39ead6cbd81c848b8563c = crrev.com/c/1099564 by senorblanco@chromium.org
"Adjust the edge-AA tessellator maximum verb count."
Landed in 69.0.3465.0

Similar: bug 908646, bug 882584.

horis.iseleznev@ Thanks for the issue.

As per comment #3, this issue is similar to issue 908646. Hence merging this issue to issue 908646.
Please feel free to undupe if it is not similar.

Thanks..

This issue is not similar at all. Please undupe (I have no rights to do it by myself).

It's not totally unlikely that it is a dupe (it was introduced by the same commit), but we can leave that for deeper analysis to figure out.

Thanks