Hi!
I have updated my “Advanced Vehicle Kit” to the 4.17 engine version on the marketplace, but it has a little bug.
Actually, this bug is the same that my project had in 4.9.
This bug was fixed in 4.10 and it’s back again in 4.17, it had back then this ticket number: UE-21684.
I have made a bug report on answers hub which can be found here:
I hope that, this will get fixed again.