Trains in Auto and sometimes manual are being separated which will sometimes lead to a crash. Any thoughts or should I put this mod on Hold. I kind of build a world with the mind set of using the tunnels.

For now you can only try to give the trains more straight rails after the exits and not switch them between auto and manual, jump in and out, or add/remove cars when they are in a tunnel.

I hope to reduce these problems future versions.

They are on a straight rail under a large lake. Kind of weird, I was able to fix it in the past but now its just this one part that is giving me trouble. I always do a test run on the track on manual to see if the tunnels run then I switch to auto, its at that time this one tunnel is giving me an issue. I wonder if having multiple tunnels next to each other has this effect. I got 4 lines close to each other and they are all straight. I love the mod and can't wait for an update.

edit: Tunnels does not like the MK2 train wagons after a couple of runs. From the Over Powered Train Speed and Brakes mod. I think that is the name of it. The normal wagon seems to be working now.

The tunnels don't take kindly to faster / modded trains. I have tested this myself, and the modded trains (from a different fast train mod) do this on a regular basis