As title says when two trains are coupled using the Train Coupler the back train icon/marker remains on Journeymap.

Steps to reproduce:

1. Create two trains
2. Couple them
   (this is it, also works with decoupling a train in first step)

Please confirm this still happens on 1.2.3 (please allow up to 10 seconds for journeymap to update, or use the command /snrc reload_jmap