UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36

Example URL:
http://flashcanvas.net/examples/dl.dropbox.com/u/1865210/mindcat/canvas_shadow.html

Steps to reproduce the problem:
1. Create a canvas and canvasContext(2d)
2. Specify context.shadowOffsetX and context.shadowOffsetY.
3. Rotate the canvas context arbitrarily with ctx.rotate(x).
4. Use context.drawImage with a dataURL or other image, with or without transparency.

What is the expected behavior?
Drop shadow is drawn according to canvas-relative shadow offsets and in the shape of the image or non-transparent portions.

What went wrong?
No shadow when context has been rotated. Shadow IS drawn when context rotation is zero.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? Yes At least six months ago. Only noticed today.

Does this work in other browsers? Yes 

Chrome version: 49.0.2623.112  Channel: n/a
OS Version: Xubuntu
Flash Version: Shockwave Flash 21.0 r0

URL given is a handy test page, but the image text has an obnoxious fading action that fades out completely at zero rotation. Another test is my own project: http://caliber.online, where each tank should have a separate shadow for body and turret. A body or turret facing directly east (zero rotation) will have a shadow appear, but any rotation and the shadow is not drawn.