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What is the bug/issue?
When using asymmetry trains on JGRPP 0.72.0 or after, There's a bug when trains are reversed.
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How did you make the bug/issue happen?
Make an asymmetry trains(113, 211, E231, E233 and so on), and reverse it.
The position of green cars, which is usually at car 4 and 5, are changing when the train is reversed.
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What would fix the bug?
Before 0.72.0, There was no bug like it.
I assume that there is a collision with the new logic on JGRPP 0.72.0 and JP+ NewGRF's code, which is intended to force the position of cars, not to be fliped when reversed.
Screenshots:
Please add screenshots to help describe the issue.

Forwarding 113 Series Train.
Double decker green car is in 4th.

Reversing 113 Series Train.
Double decker green car is in 7th.
OpenTTD version:
Please put the version of OpenTTD you are using here.
JGRPP 0.72.0 and JGRPP 0.72.1
What is the bug/issue?
When using asymmetry trains on JGRPP 0.72.0 or after, There's a bug when trains are reversed.
How did you make the bug/issue happen?
Make an asymmetry trains(113, 211, E231, E233 and so on), and reverse it.
The position of green cars, which is usually at car 4 and 5, are changing when the train is reversed.
What would fix the bug?
Before 0.72.0, There was no bug like it.
I assume that there is a collision with the new logic on JGRPP 0.72.0 and JP+ NewGRF's code, which is intended to force the position of cars, not to be fliped when reversed.
Screenshots:
Please add screenshots to help describe the issue.
OpenTTD version:
Please put the version of OpenTTD you are using here.
JGRPP 0.72.0 and JGRPP 0.72.1