Popups don’t open

Hello,

Multiple times now when I open a page and call PUM.open(ID); the popup opens halfway somehow, like it doesn’t load fully. This happens around 10% of times after I load the page.

I’m finding it hard to debug this due to the inconsistency of this bug, but I can seriously conversions.

Is there way way to make sure the popup content is fully loaded before calling PUM.open(ID); ?

Thank you.