Blackwood GP (including reverse and all cars) has dissapearing turn 1 sign (last one with ATL logo).

Same bug with 0.6 B and 0.5 Z10.

Way to reproduce:

- set view behind car
- drive near blue/white barier on left side at before turn 1
- when you pass "ATL racing fuel cells" sign, then it will dissapear

I can reproduce it but as you say it only disappear's when on the grass.

Good find