SCHEDULE-6-1-2, iCal format discrepancy

[Steven77401]

I am using ONVIF DTT 25.06 rev 93. The test case SCHEDULE-6-1-2 is failing at step 20 with a schedule state change notification not being received.

I think there is an issue at step 7 with the schedule used for creating the schedule that is causing this failure.
The test seems to use one letter abbreviations for weekdays (e.g. BYDAY=T;) instead of the iCal standard using two letter abbreviations (e.g. BYDAY=TU;). However, with a temporary workaround of also accepting single letter BYDAY weekdays I was able to pass all steps of this test.

In the iCalender specification rules linked below they require 2 letter weekdays: weekday = "SU" / "MO" / "TU" / "WE" / "TH" / "FR" / "SA"

https://icalendar.org/iCalendar-RFC-5545/3-3-10-recurrence-rule.html

Passing_SCHEDULE-6-1-2-v15.06 CHANGE SCHEDULE STATE - CHANGE STANDARD.xml
Failing_SCHEDULE-6-1-2-v15.06 CHANGE SCHEDULE STATE - CHANGE STANDARD.xml