I am quite unskilled on UI but have been tasked with looking at behavioral problems on our site. It has been observed that the app acts differently when a user clicks on a submit button with a mouse versus tabbing to it and the pressing Enter on the keyboard. In particular, after a mouse click on the submit button on a specific page I see the data being updated correctly on the next page. In the tab-enter scenario, the data is not updated on the screen on the following page however, the db shows updated data and navigating to another page that shows data then has the correct data.
I have noted that our submit button is created through a custom tag (compounding my ignorance). Is this a commonly known bug/feature of HTML?