I've had a lot of folks reach out about issues with the banner images. I shared the specs and they are still displaying poorly. I also have experienced this in groups and have defaulted to abstract images to avoid issues.

Here is a response from Trebor Scholz after sharing the image specs:

"I did try this, Krisha.

When I uploaded, this showed the same issue — the banner I designed seemed way to big, also with your dimensions. But there is also hardly any view in which the banner is easily seen in full with the new design.

TBH, I thought the previous design was much clearer and user-friendly.

In any case, no, those dimensions did not work. I don’t have capacity to play with it more, just used a wallpaper the banner"