Can't reliably reorder cards in the same or another stack using Deck API

[SemmerSky]

Describe the bug

The Deck API provides the following endpoint to change the order of a card:

PUT /boards/{boardId}/stacks/{stackId}/cards/{cardId}/reorder

However, it is currently not possible to reliably change the order of a card, neither:

• within the same stack, nor
• when moving it to a different stack with a defined order.

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What I'm trying to do

I am using n8n to automate card sorting in Deck. My goal is:

Sort all cards in a specific stack by duedate, using the API.

To do this, I loop through all cards in a stack and assign them new order values (0, 1, 2, ...) based on ascending due dates.

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Problems I encountered

1. Changing order in the same stack has no effect

When I send a PUT request like:

{
  "stackId": 122,
  "order": 0
}

for a card that's already in stack 122, nothing changes — the card remains at the same position.
Even though the API responds with 200 OK, the UI shows no update.
This makes it impossible to reorder cards inside a stack programmatically using the API.

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2. Moving card to another stack doesn't respect target order

If I move a card from stack 122 to stack 123 using:

{
  "stackId": 123,
  "order": 1
}

the card is inserted at position 4, not at the expected position 2.

Deck internally starts with order = 0 representing the first visible position, so order = 1 should correspond to position 2 — but that’s not what happens.

It seems the card is inserted into the target stack, then sorted in a way that shifts its position further down — possibly because Deck already considers the card inside the stack when applying the order.

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Expected behavior

• I should be able to reorder cards within the same stack using the order field.
• I should be able to move a card to another stack and place it at a specific position using order.

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Client details

• OS: Linux (via n8n)

• Tool: n8n HTTP Request Node

• API endpoint used: /boards/{boardId}/stacks/{stackId}/cards/{cardId}/reorder

• Deck App version: v1.1

• Nextcloud version: Nextcloud Hub 9 (30.0.6)

• Method: PUT

• Headers:

  • OCS-ApiRequest: true
  • Content-Type: application/json

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Server details

• OS: Ubuntu 22.04
• Web server: Apache
• PHP: 8.3.17
• Database: PostgreSQL
• Installed via: Nextcloud AIO
• External authentication: No