I found this regression on Ubuntu 14, OpenJDK 1.8, Jenkins 2.17. All the wrappers disappeared from all of my job where i used rvm.
I tried to roll back Rvm plugin to 0.4, job-dsl to 1.47 and jenkins to 2.16.

When nothing helped i installed fresh 2.7.2 and ran DSL there. Same problem, if one of wrappers is RVM - no wrappers are used in the job.
Both times i checked the XML, and wrappers were there.
If i define RVM in UI - everything is OK.