@Edent Oh, interesting. The text is only rendered if the image’s width and height are large enough for the text to fit in a single line. The minimum width depends on the text. The minimum height seems to be 56px.
edit: The minimum height depends on font-size (larger text is taller). It seems to be around 3em. The [?] icon is vertically centered, so I guess the minimum height is based on being able to fit 3 lines of text.