Issue Summary

This is reproducible on Data Center: (yes)

Steps to Reproduce

Add card through API in pos 0 removes the add card button of the board

Here are steps to reproduce:

1. Go to any board
2. Create a new list
3. Get the technical ID of the newly created list
4. Execute the POST command to create a card in position 0: <https://api.trello.com/1/cards?key=<APIKEY>&token=<APITOKEN>&name=My+Card&pos=0&idList=<ID_OF_EMPTY_LIST>>
5. There is now a card in the list with the name “My Card“ that was created via the API
6. Now try and add another card to the same list and you will reproduce the issue, the add a Card disappears once you click on it.

To fix the issue after the problem occurred move a card from a different list to the new list, the add a Card will work properly after it.

Expected Results

The add a Card should work after you create the card through API.

Actual Results

The "add a Card" option doesn't work. Once you click on it, the option to add disappears, and you can't create a new card.

Workaround

None