The ' ( ' shaped metal does not even have collisions set, it is just for looks. So that is not the issue. I have not had any issues with the crossovers, and I have gone across them at 20-25mph with large trains. Could you tell me what locomotive you were using? and which crossover it was? I will try to recreate the issue so I can investigate.
Viewing post in Placeable Railroad Track comments
It doesnt really matter which one becouse all of them were doing the same. Some of them were affected more (Amtrak SDP40F) some less (BNSF SD70ACe) but all were jumping. I also used BNSF C44-9W (on screenshot above) and Amtrak SW1500 for testing.
I also was trying to recreate this bug today and.. everything was working fine as it should.. now i dont get it why is that ._.