Issue Summary

Checkbox customfield will occasionally show different values in the UI compared to actual value

Steps to Reproduce

1. Create a new custom field of type Checkbox
2. Via API, change the values of the checkbox with the following API call:

PUT https://api.trello.com/1/cards/fIVZSxvI/customField/6704331a17b5f2cb41af2c9d/item

Body:
{
  "value": {
    "checked": "false" | "true"
  }
} 

1. Note that when the value sent is "true", the UI correctly reflects the information provided by the backend.
2. Now send the payload again and change the value of "checked" to "false"

Expected Results

The backend and the UI display the same state, unchecked

Actual Results

In some systems, the checkbox remains checked while the backend reports as "unchecked" instead.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available