After the update to fw 16.17 the bug where the breadcrumb trail and the planned trail were the same colour was fixed, but this fix introduced a change where the breadcrumb trail is now drawn in the layer below the planned course trail.
If I follow the planned course precisely, the breadcrumb trail will be difficult to see under the planned course, while in the previous versions it was the breadcrumb trail that was being drawn above of the planned course, which makes more sense because 1) logically the breadcrumb trail is the last of the two to be drawn and 2) this way one half of both trails is still often visible, while in the current version the planned course is the only one that can be fully seen at any time.