Hi,
When i enter some text and select a headline on paragrapghs section and then follow below steps, Apply formating option is disabled.
The below steps have been performed on the RTE demo page and can reproduce this issue.
step1: select the above created head line and select copy styling option from the format painter
step2 : type in some normal text and try to apply the above copied style
Step3: Apply Formating option is disabled.
Please let us know if this has been identified already as a bug and what is the solution.