I have experienced this problem in Muse 2015, 2017 and 2018.
Text placement in submit button in Muse Design Mode shows text placed correctly.
Text placement in submit button in Web Page Preview, Business Catalyst and Live web site shows text placed incorrectly.
Problem is the same for:
Methods to vertically align text:
Both methods result in incorrect placement of text.
Is Muse Design Mode displaying placement incorrectly or is it in the browser?
Is there a solution to this?
Have you tried to preview the page with different browsers?
It sounds like a different browser rendering method.
Chrome and Safari Mac OsX - El Capitan to Sierra
Safari and Chrome iOs 9, 10
Android v6, Chrome
Same result on all browsers, on all web sites I have created.
Configure the same paddings for this button in the spacing panel. The default value is not the correct value.