Strange bug with DynamicTexture on some servers

Hi everyone,

I'm using DynamicTexture in a projet. It works like a charm in our servers,

But now we delivered the project to an other server and we get the following error:

In Chrome console:

babylon.3.0.max.js:9192 Uncaught DOMException: Failed to execute 'texImage2D' on 'WebGL2RenderingContext': Tainted canvases may not be loaded.
    at Engine.updateDynamicTexture (babylon.3.0.max.js:9192:22)
    at DynamicTexture.update (babylon.3.0.max.js:42260:41)

In Firefox console:

SecurityError: The operation is insecure.  babylon.3.0.max.js:9192
    Engine.prototype.updateDynamicTexture babylon.3.0.max.js:9192:13
    DynamicTexture.prototype.update babylon.3.0.max.js:42260:13

In Edge console,

SCRIPT5022: SecurityError
babylon.3.0.max.js (9192,13)

with a link pointing to https://msdn.microsoft.com/query/dev12.query?appId=Dev12IDEF1&l=FR-FR&k=k(VS.WebClient.Help.SCRIPT5022)

It looks like the culprit line in BJS is:

this._gl.texImage2D(this._gl.TEXTURE_2D, 0, internalFormat, internalFormat, this._gl.UNSIGNED_BYTE, canvas);

I can't reproduce the bug in the Playground, I can't even reproduce it on my own servers...

Any idea what the problem could be ?