This was re-found by Dickon and Jon later the same day and they said there was also a phreatic tube visible from the pitch head.
DIckon's description of 2018-dm-06:
Climb down boulder tickle 5m leads to 2m climb. Rift continues to 4m pitch into chamber, unpushed. Small passage in roof above pitch ledge to left continues 30m through narrow crawl to 4-way intersection. Unexplored further.
on's phone DD 47.69514N 13.80591E
Since 2018-dm-06 is 30m away from 2018-ms-03 either someone has misread their GPS or they are different caves. The area needs revisiting.
logbook 2018-07-11a