Setting mode file local variable to polymode applies itself recursively infinitely until cancelled

[ilovecherries]

When creating a polymode, let's say like poly-js-html-mode where there's HTML inside of a template string in the JavaScript, and I apply a file local variable to set the mode automatically such as:

// Local Variables:
// mode: poly-js-html
// End:

It seems to enter an infinite loop where it keeps applying the mode variable and keeps asking the kill the HTML buffer (I assume it uses a buffers to manage internal modes) over and over until I hit Ctrl-g.

In the debugger, it looks like maybe it's because it applies the polymode at the top level, loads javascript-mode again for the host, and then it keeps trying to reload the mode variable because it's not the polymode and gets stuck in this loop.