Vanishing description bubble with different poster styles

Hello,

I have a gridscreen I’m using as a home screen on a channel. The top row is a series of menu options, with lists of content below. When I SetListPosterStyles all to the same style, the description bubble remains, just as though I didn’t declare styles. However, if I have rows with different poster styles ([“square”, “portrait”, “portrait”]), the description bubble vanishes as soon as I switch rows.

I’m using a mixed-aspect-ratio grid with a display mode of scale-to-fill, if that matters.

Thanks for any help, and please let me know if I should supply more info or code.