Discriminator-less username mentions are impossible when a role name exists that contains same first chars (up to but not including the final char); implement a way to re-differentiate

With role names that consist of a substring of the first characters (up to but not including the final character) of a username which does not have number discriminators, Discord misinterprets a username mention as a role mention, and the role mention is prioritized over the name mention. e.g. Suppose there is user @abcdefg and role @ABC. Attempting to mention the user will result only in highlighting the role, and the message will appear [@ABC]defg with square brackets indicating highlight. These need to either have a separate special character to indicate a mention for roles versus usernames (though this seems unreasonably confusing), bring back discriminator numbers in usernames (or in role names?) so that roles and usernames are clearly separate distinguishable types of text, or if neither of these changes, then Discord needs a better way to distinguish based on context which one is trying to be mentioned.