roGridScreen and HTTPS Urls

I'm having an issue with roGridScreen loading images from an https url. Other screens and objects are working fine and correctly load images and audio from https urls: roPosterScreen, roAudioPlayer, roSpringboardScreen, roUrlTransfer.

This is what my code looks like:

function CreateGridScreen() as Object
    screen = CreateObject("roGridScreen")
    screen.SetCertificatesFile("pkg:/certificates/cert.pem")
    screen.InitClientCertificates()
    return screen
end function

My code works perfectly with http urls. I'm guessing this is a firmware bug, but I thought I'd ask. I have firmware 3.1.1011.