In the Docs app on Android, if you click on a bullet item, then indent it, then click on a different bullet item, and try to indent it, the indent will be applied to the first item rather than the one your curser is on.

I will post a link to a video of it but I can't right now because I can't share docs publicly from mobile (see this report https://protonmail.uservoice.com/forums/932839-proton-drive/suggestions/51872847-add-all-of-the-file-sharing-options-to-the-app).