Radio Sultanate of Oman in Arabic on 15140 kHz at 1400UT April 7

OMAN   Radio Sultanate of Oman in Arabic on 15140 kHz from 1400UT on April 7:
1355-1400 on 15140 THU 100 kW / 315 deg to WeEu Ar, unscheduled before 1400UT
1400-1500 on 15140 THU 100 kW / 315 deg to WeEu Arabic, instead of English px
from 1500 on 15140 THU 100 kW / 315 deg to WeEu Arabic, as scheduled in A-20.
Something`s always wrong at R.Sultanate of Oman Thumrayt transmitting station
https://www.youtube.com/watch?v=41lMQITWZds&feature=youtu.be
https://www.youtube.com/watch?v=9b1z67k1eD0&feature=youtu.be
https://www.youtube.com/watch?v=qmHKCTQtX24&feature=youtu.be
https://www.youtube.com/watch?v=SzFJVP0cDyc&feature=youtu.be