Click back on the original text box and the style is back to the way it was. Changing the style in the dropdown box did not change the style in the text box.
Please export the problem annotation to a file.
Verify the problem exists in the sample file.
Post the file in a reply.
Please include a description of what you’re specifically trying to change so we can repeat the issue.
Unlike my usual practice when I see odd behavior, I deleted all the text boxes and created new ones without saving a sample file. I have reported this before so I will certainly encounter this again.