Time slot was dead after update to 19.6.1
if providers works time ex: from P.M. 17:00 to next day A.M. 02:00, there are show P.M. 17:00 to A.M. 23:30 time slot only at booking steps now. (A.M. 00:00 00:30 01:00 was gone)
but it works well before update.
please check it thanks