If a train going at high speed is caught by a locking track it should explode unless slowed down first.

This was not an issue before because locking tracks did not go on high-speed tracks, and high-speed trains would explode when going onto locking tracks because they were always a regular track.

When a high-speed train goes over a powered high-speed locking track nothing should happen.

I'm not sure if this can be classified as a bug or not. Probably can.

Should we just disable such a combination @Forecaster?

...no?

Why would we do that? It should be made to work properly.

To be honest, I think the train should explode, or derail or something if it is traveling at high speed on a high speed rail, and hits an unpowered locking rail.

Same if it hits a switch, wye, or vanilla junction.

Fixed.