The day after updating to Microsoft Portal 188.8.131.52, we noticed the functionality on some of our pages was no longer working.
For example, this page had some simple HTML code with a couple of options and a Submit button:
This page worked prior to the portal update:
After doing some investigation, we found the issue was something that is easily overlooked when designing pages or coding. A CSS class!
The “submit-btn” CSS class is something a developer may have used or copied over from an existing page to use for the Continue button, and it turned out to be the root cause of the problem.
Moving forward, we suggest removing this CSS and any CSS class you are not using.