Just tried to place freight cars behind the Shay Engine , bump into a freight car and they rolled overlapping the Engine . have to break and start again .

Trains and rollingstock still don't have full collisions with each other.
They can usually be pushed out with some effort, i'll take a look into getting it going tomorrow but i make no promises.

you need to wait till the picture is uploaded...

I found that this can happen on any on the Engines . I bumped a couple of random cars and they all , a total of 4 cars , ended up overlapping the engines . No way to couple , so had to break and start over . I did find a work around , by placing a block above the track behind each engine and car provides a collision barrier until i couple everything . Then remove the blocks

When placing flat cars behind a , 4-4-0 Steam , or a Shay Steam , or a Forney Steam coupled to a 4-4-0 Tender or coupled with any tender , bumping into the flat car directly behind , causes it to roll overlapping the Forney Steam or any other Steams . Have to break Steam and Tender and flat car , then start over .

fixed in 99330dd