Parts connections get mixed up

[DrprofLuigi]

There seems to be an issue with parts connecting that shouldn't be. Trailers seem to get their connections messed up. When I have two trailers connected, and I click to release one, both will disconnect. Same with props, when I click one, both spin (on both BETA 8 and 9). I can even start one engine from the other.

Here is an example json from the updated UNU Navigator (the first engine is part 4):

            "pos" : [2.875, 0, 3.59375],
            "types" : ["engine_radial"],
            "defaultPart": "unuparts:unuparts_part_unu_engine_r09",
            "minValue" : 0.75,
            "maxValue" : 1.2,
            "intakeOffset": -0.5,
            "interactableVariables": [["!part_present_5"]]
        },
                {
                    "pos" : [2.875, 0, 4.125],
                    "types" : ["propeller"],
                    "defaultPart": "unuparts:unuparts_part_unu_propeller_3d054",
                    "minValue" : 133,
                    "maxValue" : 133,
                    "interactableVariables": [["part_present_4"]],
                    "linkedParts" : [4],
                    "animations": [
                        {
                            "animationType": "rotation",
                            "centerPoint": [2.875, 0, 4.125],
                            "axis": [0, 0, -1],
                            "variable": "propeller_rotation_1"
                        },
                        {
                            "animationType": "rotation",
                            "centerPoint": [2.875, 0, 4.125],
                            "axis": [0, 0, 1],
                            "variable": "engine_rotation_1"
                        }
                    ]
                },
        {
            "pos" : [-2.875, 0, 3.59375],
            "types" : ["engine_radial"],
            "defaultPart": "unuparts:unuparts_part_unu_engine_r09",
            "minValue" : 0.75,
            "maxValue" : 1.2,
            "intakeOffset": -0.5,
            "interactableVariables": [["!part_present_7"]]
        },
                {
                    "pos" : [-2.875, 0, 4.125],
                    "types" : ["propeller"],
                    "defaultPart": "unuparts:unuparts_part_unu_propeller_3d054",
                    "minValue" : 133,
                    "maxValue" : 133,
                    "interactableVariables": [["part_present_6"]],
                    "linkedParts" : [6],
                    "animations": [
                        {
                            "animationType": "rotation",
                            "centerPoint": [-2.875, 0, 4.125],
                            "axis": [0, 0, -1],
                            "variable": "propeller_rotation_2"
                        },
                        {
                            "animationType": "rotation",
                            "centerPoint": [-2.875, 0, 4.125],
                            "axis": [0, 0, 1],
                            "variable": "engine_rotation_2"
                        }
                    ]
                },```

[DrprofLuigi]

There is a very similar issue with the Aurornis. All props spin regardless of which engine is on. These props also appear to produce thrust.

[DonBruce64]

Fixed in V22.2.0.