Bug: Keep being told I'm not a member of groups

Bug: Keep being told I'm not a member of groups

I was checking my notifications. When I tried to respond to someone's comment on a post I made, I got this error message. When I went back to the community's main page, it still showed me as a member.

This happened three times, once in Energy, once in Life Is Strange, and once in Love of Cooking.

On Moto X running Android 5.1.