This is a known issue, and unfortunately one that I haven't pointed out publicly as I haven't formally announced the Participant Cap feature, haha. I had wanted to make sure it was working as intended first.
Unfortunately, yes, participants cannot remove themselves from an event if the event hits it's cap. As a compromise until this issue is resolved, Contributors and Committee are able to remove them from the event, so anyone wanting to drop out should be contacting a member of the team, or the Event Organizer so they can make the arrangements instead.
Hopefully we'll have this resolved soon!
Unfortunately, yes, participants cannot remove themselves from an event if the event hits it's cap. As a compromise until this issue is resolved, Contributors and Committee are able to remove them from the event, so anyone wanting to drop out should be contacting a member of the team, or the Event Organizer so they can make the arrangements instead.
Hopefully we'll have this resolved soon!