I've been having problems with snippets not working intermittently. When they fail to work, they either only expand part of the snippet (i.e., they don't insert all of the text in the snippet), or instead of expanding the snippet, they just paste whatever is currently on the clipboard. Sometimes if I try it a second time, it works, however, that's not guaranteed. I saw a similar post from another person and I believe his password manager was to blame, but I don't use the same one. I do use Pastebot for a clipboard manager and 1Password as a password manager, so perhaps they have something to do with it? I've attached a screenshot with the specifics of my MacBook.