Hate to quote myself but want to clarify what I'm seeing:
Using oRA2 split for modules (_Leader etc). After initial login to game (only initial or after a reload). If I'm not in a group, invite someone, and Convert to Raid it appears the Leader module does not load because Invite and other options are not present. If I load oRA2 first (click on icon) everything is fine. Non split installation seems to be fine. Hopefully this makes more sense, I'm pretty damn sure this just recently started.
I am having the same issue as well. Invite a player, convert to raid, and "/rakeyword" remains an unrecognized command and none of those invitation options appear in the oRA menu despite the mod clearly being enabled.