I cannot seem to figure out why the 'Show' button next to 'attachment' is missing on one of my protonmail accounts. In other accounts, if I write an email and attach multiple images or files, I can click on 'Show' to see the attachments, but on one particular account, that button isn't there. More specifically, the button shows up briefly when I open a draft, and then it disappears. I haven't found any setting that controls this.