Roscosmos has now officially announced the delay of Soyuz TMA-17M from May 26 to late July, to allow accelerated processing of the next Progress (originally scheduled for August 6) to support launch in early July, and to finish analyzing the fault that cost the last one. Meanwhile, Soyuz TMA-15M was due to undock tomorrow, but that has now been delayed as well to avoid leaving the station with a three-man crew for an extended period. June 11 is seen as a likely date, although Roscosmos hasn’t picked a date officially yet; this would give ESA astronaut Samantha Cristoferetti of Italy the opportunity to take the female single-flight endurance record, a rare example of such a record being held by neither a Russian nor an American. The record currently is held by American astronaut Sunita Williams, and will be eclipsed on June 7.
Before either Progress or Soyuz can reach the station, however, there will be another Dragon arriving. The SpaceX CRS-7 mission is still scheduled for June 19.