@omkar-pd I have checked the "MR !218" in my local, and the issue still exist...

@omkar-pd I have checked the "MR !218" in my local, and the issue still exists. Clicking the plus button after setting the zoom level to more than 25% causes the zoom level to reset to 25% before gradually increasing and the same with the minus button.

I have added the patch to fix the issue, after adding this patch the viewport will gradually increase and decrease by clicking plus and minus buttons.