Steps to reproduce:

• Create a function definition of And:
  • If you don't have it yet, go to the Api Sandbox wikilambda_edit API: http://localhost:8080/wiki/Special:ApiSandbox#action=wikilambda_edit&format=json&summary=New%20And%20type&token=%2B\
  • In the zobject textbox paste the following and click "Make request":

{
	"Z1K1": "Z2",
	"Z2K1": {
		"Z1K1": "Z6",
		"Z6K1": "Z0"
	},
	"Z2K2": {
		"Z1K1": "Z8",
		"Z8K1": [
			"Z17",
			{
				"Z1K1": "Z17",
				"Z17K1": "Z40",
				"Z17K2": "Z0K1",
				"Z17K3": {
					"Z1K1": "Z12",
					"Z12K1": [
						"Z11",
						{
							"Z1K1": "Z11",
							"Z11K1": "Z1002",
							"Z11K2": "first input"
						}
					]
				}
			},
			{
				"Z1K1": "Z17",
				"Z17K1": "Z40",
				"Z17K2": "Z0K2",
				"Z17K3": {
					"Z1K1": "Z12",
					"Z12K1": [
						"Z11",
						{
							"Z1K1": "Z11",
							"Z11K1": "Z1002",
							"Z11K2": "second input"
						}
					]
				}
			}
		],
		"Z8K2": "Z40",
		"Z8K3": [ "Z20" ],
		"Z8K4": [ "Z14" ],
		"Z8K5": "Z0"
	},
	"Z2K3": {
		"Z1K1": "Z12",
		"Z12K1": [
			"Z11",
			{
				"Z1K1": "Z11",
				"Z11K1": "Z1002",
				"Z11K2": "And"
			}
		]
	}
}

• Go to the createZObject special page: http://localhost:8080/wiki/Special:CreateZObject?view=zobject-editor
• Under "Contents" select the type "Implementation"
• Select the function "And"
• In the composition gray box, select the function "If"
• In "condition" select mode "arg"
• To create an argument reference you must now select "Argument reference" on the type selector

Observed behavior:

• When selecting function if, the value of Z14K2 is:

"Z14K2": {
    "Z1K1": "Z7",
    "Z7K1": "Z802",
    "Z802K1": {
        "Z1K1": "Z40",
        "Z40K1": ""
    }

• When selecting "condition" mode "arg", the value of the Z14K2 is (condition disappears completely):

"Z14K2": {
    "Z1K1": "Z7",
    "Z7K1": "Z802"
}

• When selecting "argument reference" on the type selector, the value of Z14K2 is the correct one:

"Z14K2": {
    "Z1K1": "Z7",
    "Z7K1": "Z802",
    "Z802K1": {
        "Z1K1": "Z18",
        "Z18K1": ""
    }
}

Expected behavior:

• When selecting "condition" mode "arg", the key for condition Z802K1 should already be filled by a Z1K1: Z18 such as this:

"Z14K2": {
    "Z1K1": "Z7",
    "Z7K1": "Z802",
    "Z802K1": {
        "Z1K1": "Z18",
        "Z18K1": ""
    }
}

🤡Fun behavior🤡

• Click on the trash bin next to the "If" function used in the composition
• Start over again:
• Search and select "If"
• In the "condition" field, choose "arg" in the mode selector
• IT WORKS!!
• When reloading and starting from scratch, the behavior is unexpected, choosing "arg" clears the field. When removing the composition function and starting over again, it works as expected