That's totally plausible. I'm seeing the same results as well.
Perhaps it's time to force Diode to use HTTPS all the time. I'm concerned that there might be users in environments where they can't connect via HTTPS, but I think I've put this off long enough.
I'll also give my standard spiel that Diode is not actively developed, so you may want to consider a more modern libre reddit client like Redreader. F-Droid and Google Play.