Engine RPM indicator disappears when enabling the VCockpit HUD

Version: Latest

Frequency: Consistently

Severity: Blocker

Context: Custom created aircraft, electric engine

Bug description: When I enable the VCockpit HUD in the aircraft editor the engine RPM indicator disappears.

Repro steps: I hope the attached files help to reproduce the issue

Attachments:
aircraft.cfg (2.4 KB)
cockpit.cfg (4.2 KB)
engines.cfg (6.1 KB)
flight_model.cfg (15.2 KB)
systems.cfg (6.4 KB)