In the convoy replacer, when an upgrade is available to a vehicle and that upgrade doesn't fit to the position of the vehicle in terms of coupling constraints, the game crashes upon hovering over the upgrade's icon. The error message doesn't display in a readable way.
Thank you for your report. To reduce the amount of time that it takes me to produce a reproduction case for this, are you able to upload a saved game file where there is a specific convoy to which this applies? Thank you in advance.
Seems like this bug is gone.