[2.1.14] Parameterized Blueprints switch some signals

[rycbar]

What i did:
I placed a blueprint with cobinators that had the signals they use parameterized.

{
"blueprint":
{
"icons":
[

{
"signal":
{
"name": "constant-combinator"
},
"index": 1
}
],
"entities":
[

{
"entity_number": 1,
"name": "constant-combinator",
"position":
{
"x": 1139.5,
"y": -65.5
},
"control_behavior":
{
"sections":
{
"sections":
[

{
"index": 1,
"filters":
[

{
"index": 1,
"name": "parameter-0",
"quality": "normal",
"comparator": "=",
"count": 1,
"import_from": "nauvis"
},

{
"index": 2,
"name": "parameter-1",
"quality": "normal",
"comparator": "=",
"count": 1,
"import_from": "nauvis"
},

{
"index": 3,
"name": "parameter-2",
"quality": "normal",
"comparator": "=",
"count": 1,
"import_from": "nauvis"
},

{
"index": 4,
"name": "parameter-3",
"quality": "normal",
"comparator": "=",
"count": 1,
"import_from": "nauvis"
}
]
}
]
}
}
}
],
"parameters":
[

{
"type": "id",
"id": "parameter-0"
},

{
"type": "id",
"id": "parameter-1"
},

{
"type": "id",
"id": "parameter-2"
},

{
"type": "id",
"id": "parameter-3"
}
],
"item": "blueprint",
"version": 562954249306113
}
}

Copy blueprint

what happend:
When selecting the fill xxx barrel, crude oil ocean or lithium brine vent signals, the signals that are actually put in the combinator are the base barrel, crude oil and lithium brine.

08-23-2026, 12-24-54.png (260.88 KiB) Viewed 375 times

08-23-2026, 12-28-11.png (77.49 KiB) Viewed 375 times

What did i expect:
For all other signal if i select that signal the game will put that signal in the combinator. Specifically empty xxx barrel, sulfur geyser and fluorine vent which are very similar cases as before mentioned exceptions do not show this strange behavior.

08-23-2026, 12-31-25.png (214.73 KiB) Viewed 375 times

[SuperBananaBomb]

+1, encountered this with Fill barrel on 2.1.17.

Interestingly, Empty barrel works fine and parametrization substitutes the recipe as expected, but Fill barrel substitutes the actual item instead of the chosen recipe.