Using two year old Surface Pro with Firefox browser, an have made no deliberate changes in my imgflip settings. I have always manipulated my texts, including moving the boxes, font choice, shadow borders, case, et cetera. It appeared months ago, as a close look at my images, especially memes using the "Change my mind" template. It corresponded with the opening of more options in the settings box, I think.
Thanks, AF.
;^)