[Site Behavior] Missing sidebars in smaller window sizes

I noticed this issue while trying to narrow criteria on the homepage or find the links to make a tribe. I spent ages trying to look for the create a tribe link and felt like an idiot/frustrated after figuring out why it wasn't there. I've produced these results in both Safari and Chrome (my boyfriend has also had this issue on his phone now that I think about it).

For example, on the homepage there is a sidebar for sorting on the right-hand side. Similarly when in your personal page for tribe memberships there is a sidebar on the right-hand side for the tribes you are a chief of and creating a new tribe.

If the window is small enough, these sidebars just don't exist... you can't scroll to them or anything. For someone who doesn't know any better, they could never find the create a tribe button or front page filters. Upon making the browsing window a little wider, they appear.

This was particularly frustrating and the sidebar should always exist regardless of window size. I did a quick search to find someone pointing out the same thing, but couldn't find it, so sorry if I made a duplicate post!