model-viewer in magnific popup

[chief-kh]

I want to display model viewer in a magnificPopup.
It works fine but when I close popup and re-open it again my custom progress bar stuck at 0% meantime model is rendered on background already. I don't know if it's a cache or something.
I couldn't find any method in documentation to call so I can check model state at popup's "open" callback. Model-viewer just has "load" event which isn't fired on second popup open.
Could you help me?