A download using the HTML5 download anchor attribute can no longer be initiated, if the event handler function has some sort of delay. Try clicking the buttons in this demo: https://codepen.io/marto55555/pen/xxZbJqX?editors=1010.
This used to work in Samsung Internet and still works in Chrome, Opera, Edge, Firefox, iOS 13 Safari.
Last working version: Samsung Internet 11.2.1.3
First non-working version: Samsung Internet 11.2.2.3
Yes, I was told they will pass the feedback to the devs. But for now, we have to notify Samsung Internet users about manually disabling Block Automatic Downloads.
My apologies that you haven’t gotten timely feedback from us on this issue. I tested it myself and confirmed the problem you’re seeing. I have asked our engineering team for an update.