SDTing via API, one source work the other does not

According to the swagger for v3, the type fields is actually "sdtType":

{
timezone	string
example: America/Los_Angeles
The specific timezone for SDT

sdtType	string
example: oneTime
The type of sdt. The values can be oneTime|weekly|monthly|daily|monthlyByWeek

monthDay	integer($int32)
example: 7
The values can be 1 | 2....| 31. Specifies the day of the month that the SDT will be active for a monthly SDT

weekOfMonth	string
example: 1
The week of the month that the SDT will be active for a monthly SDT

endDateTime	integer($int64)
example: 1534554000000
The epoch time, in milliseconds, that the SDT will end

type*	string
example: ResourceGroupSDT
The type of resource that this SDT is for. The values can be CollectorSDT | DeviceDataSourceInstanceSDT | DeviceBatchJobSDT | DeviceClusterAlertDefSDT | DeviceDataSourceInstanceGroupSDT | DeviceDataSourceSDT | DeviceEventSourceSDT | ResourceGroupSDT | ResourceSDT | WebsiteCheckpointSDT | WebsiteGroupSDT | WebsiteSDT | DeviceLogPipeLineResourceSDT

minute	integer($int32)
example: 6
The values can be 1 | 2....| 60. Specifies the minute of the hour that the SDT should begin for a repeating SDT

duration	integer($int32)
example: 138
The duration of the SDT in minutes

endHour	integer($int32)
example: 5
The values can be 1 | 2....| 24. Specifies the hour that the SDT ends for a repeating SDT

startDateTime	integer($int64)
example: 1534460400000
The epoch time, in milliseconds, that the SDT will start

hour	integer($int32)
example: 3
The values can be 1 | 2....| 24. Specifies the hour that the SDT will start for a repeating SDT (daily, weekly, or monthly)

weekDay	string
example: Sunday
The week day of sdt. The values can be SUNDAY|MONDAY|TUESDAY|WEDNESDAY|THURSDAY|FRIDAY|SATURDAY

comment	string
example: Emergency prod deployment
The notes associated with the SDT

endMinute	integer($int32)
example: 18
The values can be 1 | 2....| 60. Specifies the minute of the hour that the SDT ends for a repeating SDT

}