Poll results indicate old username, even when username has been renamed

I'm trying to set up a poll that is not anonymous.  When I did a test with my iPhone, the download .csv showed the username to be "iPhone".  I renamed myself to something that would uniquely identify me, and did another poll.  However, the username in the .csv still said "iPhone".  I left the zoom, renamed myself within the zoom app, re-entered the meeting, and reran the poll, but the .csv still showed "iPhone".  The only way to change my name so that it would appear in the .csv was to stop the meeting for everybody, then change my name in the zoom app (before joining), and then re-start the meeting.  This is not an acceptable workaround...  The host shouldn't have to stop/leave a meeting and restart it so that folks can rename themselves for a poll.