Unsaved alert message not showing!

Whenever I try to open another page without saving anything on the previous pages, It  is not showing the unsaved changes alert message. I am wondering if that is the bug or if I am missing anything else. I have set the “Warn users if page has unsaved changes” To YES on skuid pages as well. Still not working.

Hmmm… Do you have a master page with models on it?

I have master page but the master page have nothing on it. Master page is blank.

Then double check models.

Model is also set to YES for alert.

Oh yeah… do you have a popup blocker in your browser?

No I don’t have pop up blocker. If i try to refresh the page, it will show the alert message but if i try to move to another page it will not show alert message.

Which platform/browser?

I’m having the same issue but only in Lightning.  I think the model changes are being “activated” (the save button is highlighted) but I don’t get the browser popup.  I do get it if I switch back to Classic