I hestitate to call this a "bug" because it's more of a very minor UI thing, but I guess close enough. Either way, this definitely isn't anything critical, but figure I'd point it out.
For Context: In most cases a style will be applied to the generation, which means that below the prompt text box, it shows a list of the styles and a "clear styles" button. I'll attach an image to show what I mean.
But when you have no style / content type / color etc, that bottom row of style tags (below the prompt text) is not showing, which causes the four image results to resize ever-so slightly (because they have more room on the page and expand).
Problem Scenario: If you want to switch between the different 'Content Type' options to compare which version of a result you like, when going from no-style to any-style, the images do a little animation and resize. Which makes it a bit harder to directly compare a style to the none-style. In other cases, where all the images stay exactly the same when switching between style options, it is very nice to have everything in the image in the exact same spot, so you can see exactly how the textures and stuff change.
Possible Solution: You could have the space below the prompt text still have something there (such as a show "no style" tag or something), which would mean the images have the same page space regardless of whether there is a style applied or not. That way, I imagine the animation wouldn't need to be re-coded or anything.