If the user types a space for the next argument, the bot cannot supply suggestions because it does not receive the entire user input.
Workaround: If there are no suggestions, try adding a space, and see if there are more suggestions. This will partially resolve the issue, but will still need to be officially fixed by Discord in order to work properly in all cases.
Upstream issue: https://github.com/discord/discord-api-docs/issues/5878
If the user types a space for the next argument, the bot cannot supply suggestions because it does not receive the entire user input.
Workaround: If there are no suggestions, try adding a space, and see if there are more suggestions. This will partially resolve the issue, but will still need to be officially fixed by Discord in order to work properly in all cases.