As predicted, a new version of Suica App is coming in tandem with the new JR East Shinkansen eTicket service launch on March 14. Suica App users must update to v2.6 by March 18, after that date older versions can no longer login to Mobile Suica. The new version removes the legacy Suica In App Shinkansen eTicket function.
A new Eki-net app that supports the new eTicket service should be coming at the same time. The old Suica App Shinkansen eTicket service ends March 13.