It was 1935 that Shipton and Dan Bryant went up there, but apparently they only climbed smaller peaks in the area, not Khumbutse and not even Lingtren.
Khumbutse was also climbed again in early 1989 by the Yugoslav team that repeated the west ridge. It was this expedition where several team members were killed in an avalanche on the slopes of Khumbutse, over which they climbed as part of their ascent/descent. Angie Marciniak survived, radioed Artur Hazjer in KTM (who climbed Makalu a few days ago!) and Rob Hall and Gary Ball and others set out from KTM and arrived at the Lho La in time to rescue Marciniak.