Is there a way to control how the channel “banner” is cropped from the channel icon in the Plex mobile app?
I have a channel with an icon that looks, for example, like this in the Plex app on my iPhone:

But when you tap on the channel icon to actually use it, there’s a banner along the top that seems to by default crop to the center of the icon, so it looks like this:

Is there a way to either control where/how the banner image is generated, or replace it with a specified image? Here’s my main handler:
@handler("/video/mychannel", NAME, thumb="icon-default.jpg", art="art-default.jpg")
Thanks.