Graph API bug changing recurrence from "noEnd" to "numbered"

Question

I have an event in Outlook with an attendee that uses Google calendar. When I change the event recurrence range type using the graph API from "noEnd" to "numbered", the google attendee's event does not get updated.

Here is the code I am using to set the recurrence as "noEnd":

public async System.Threading.Tasks.Task SetDailyRecurrenceForever(string ExternalID, string CalendarRefreshToken)
    {
        var tmpEvent = new Microsoft.Graph.Event
        {
            Recurrence = new PatternedRecurrence
            {
                Pattern = new RecurrencePattern
                {
                    Type = RecurrencePatternType.Daily,
                    Interval = 1,
                    FirstDayOfWeek = Microsoft.Graph.DayOfWeek.Sunday,
                    Index = WeekIndex.First
                },
                Range = new RecurrenceRange
                {
                    Type = RecurrenceRangeType.NoEnd,
                    StartDate = new Microsoft.Graph.Date(2020,10,6),
                    RecurrenceTimeZone = "Central Standard Time",
                    NumberOfOccurrences = 0
                }
            }
        };

        var graphClient = await MicrosoftAuthenticationProvider.GetGraphClient(CALENDAR_CLIENT_ID, CALENDAR_CLIENT_SECRET, CALENDAR_REDIRECT_URI, CALENDAR_ACCESS_SCOPES, CalendarRefreshToken)
                .ConfigureAwait(false);

        
            await graphClient.Me.Events[ExternalID]
            .Request()
            .UpdateAsync(tmpEvent)
            .ConfigureAwait(false);           
    }

Here is the code I am using to set the recurrence as "numbered":

public async System.Threading.Tasks.Task SetDailyRecurrenceForFiveDays(string ExternalID, string CalendarRefreshToken)
    {
        var tmpEvent = new Microsoft.Graph.Event
        {
            Recurrence = new PatternedRecurrence
            {
                Pattern = new RecurrencePattern
                {
                    Type = RecurrencePatternType.Daily,
                    Interval = 1,
                    FirstDayOfWeek = Microsoft.Graph.DayOfWeek.Sunday,
                    Index = WeekIndex.First
                },
                Range = new RecurrenceRange
                {
                    Type = RecurrenceRangeType.Numbered,
                    StartDate = new Microsoft.Graph.Date(2020, 10, 6),
                    RecurrenceTimeZone = "Central Standard Time",
                    NumberOfOccurrences = 5
                }
            }
        };

        var graphClient = await MicrosoftAuthenticationProvider.GetGraphClient(CALENDAR_CLIENT_ID, CALENDAR_CLIENT_SECRET, CALENDAR_REDIRECT_URI, CALENDAR_ACCESS_SCOPES, CalendarRefreshToken)
                .ConfigureAwait(false);


        await graphClient.Me.Events[ExternalID]
        .Request()
        .UpdateAsync(tmpEvent)
        .ConfigureAwait(false);
    }

The bug is also repeatable by sending a PATCH using the graph explorer: https://graph.microsoft.com/v1.0/me/events/{ID}

Update the event as "noEnd":

{"recurrence":{"pattern":{"type":"daily","interval":1,"month":0,"dayOfMonth":0,"firstDayOfWeek":"sunday","index":"first"},"range":{"type":"noEnd","startDate":"2020-10-06","endDate":"0001-01-01","recurrenceTimeZone":"Central Standard Time","numberOfOccurrences":0}}}

Update the event as "numbered":

{"recurrence":{"pattern":{"type":"daily","interval":1,"month":0,"dayOfMonth":0,"firstDayOfWeek":"sunday","index":"first"},"range":{"type":"numbered","startDate":"2020-10-06","endDate":"0001-01-01","recurrenceTimeZone":"Central Standard Time","numberOfOccurrences":5}}}

The following video displays the behavior the google attendee is experiencing: https://www.screencast.com/t/uhwovvZf

Note: At the end of the video I show that switching the interval to 2 will cause the google event to be updated properly, so this is specifically a problem when the interval is 1.

Is this a known bug? Does anyone have a work-around for it?