I can read and I see that experienced LFS drivers are only complaining about FPS drops on open configs.
I myself have no access to open configs, that's why in my earlier post I have said I have only noticed FPS increase. And I haven't mentioned layouts at all.
Initially, in the SetUp (shift-P), I selected 25% of fuel and 30% for the next pit stop.
Race started and I was forced to make a pit-stop at lap1.. so I changed Pit instructions (F12) to no additional fuel (0%) before entering pit-lane.
I saw no message of refueling (may be it appeared) but the car got 30% of additional fuel. I did 38 laps at so4r with FBM without pitting, so the fuel was added for sure.
I don't know if this is specific to Z30 and Z31, but I'm almost sure that some one else would had noticed it if present in Z28.
I don't remember my remaining unlocks, thats why I don't try to repeat it with Z28.
If any additional info is needed, don't hesitate to contact me.
I don't think it is a networking problem, because the car's physics runs locally, it shouldn't be affected by dropped packets or anything like that. And they weren't near enough to another car to suggest that another car's lag was a likely cause.
I guess, and I hope, that this was just a problem with the Z30 collision system, something like the Fern Bay gantries (which, unlike these, were easily reproducable).
I haven't heard of any false collisions with objects or falling through the road in Z31. I found a genuine cause for the Fern Bay type of false collisions in Z30, detected and eliminated them in a way that seems clean and good, so I hope these are gone now.