InvalidOperationException: Sequence contains no matching element on VivoxServiceInternal.OnParticipantRemoved

Unity Services
,
1

This error seems to be happening inside VivoxServiceInternal in the OnParticipantRemoved method.

public void OnParticipantRemoved(object sender, KeyEventArg<string> keyEventArg)
        {
            var source = (IReadOnlyDictionary<string, IParticipant>)sender;
            IParticipant participant = source[keyEventArg.Key];
            var relevantChannelName = participant.ParentChannelSession.Channel.Name;
            // The local player won't have the active channel anymore if they've left so don't try to remove participants it's gone.
            if (m_ActiveChannels.Keys.Contains(relevantChannelName))
            {
                var channelWithPartToRemove = m_ActiveChannels.First(kvp => kvp.Key == relevantChannelName);
                var participantToRemove = channelWithPartToRemove.Value.First(p => p.PlayerId == participant.Account.Name);
                channelWithPartToRemove.Value.Remove(participantToRemove);
                ParticipantRemovedFromChannel?.Invoke(participantToRemove);
            }
        }

I believe its one of these lines:

var channelWithPartToRemove = m_ActiveChannels.First(kvp => kvp.Key == relevantChannelName);
var participantToRemove = channelWithPartToRemove.Value.First(p => p.PlayerId == participant.Account.Name);

Since we’re getting this error: InvalidOperationException Sequence contains no matching element
It means that “.First()” is failing to find that element

Could I be doing something wrong to cause this error? I’m thinking that its a bug with the internal service since its before invoking an event that I listen to. I could be wrong. Any help or confirmation that this is a bug would be awesome! thank you~