Can't create child tasks when Task has a mandatory field rule

[killer-frog]

Our project has a rule that a task must have the field "Activity" Completed. however, it does not seem possible to use the one click extension with this rule in place as we get the following error

Error createWorkItem: {"name":"TFS.WebApi.Exception","status":400,"responseText":"{\"$id\":\"1\",\"customProperties\":{\"FieldReferenceName\":null,\"FieldStatusFlags\":\"none\",\"ErrorMessage\":\"TF401320: Rule Error for field Activity. Error code: Required, HasValues, InvalidEmpty.\",\"FieldStatusCode\":0,\"RuleValidationErrors\":[{\"fieldReferenceName\":\"Microsoft.VSTS.Common.Activity\",\"fieldStatusFlags\":\"required, hasValues, invalidEmpty\",\"errorMessage\":\"TF401320: Rule Error for field Activity. Error code: Required, HasValues, InvalidEmpty.\",\"fieldStatusCode\":524293,\"ruleValidationErrors\":null}]},\"innerException\":null,\"message\":\"TF401320: Rule Error for field Activity. Error code: Required, HasValues, 

Even if we specify this field in the template

Is there a work around for this?