List: Contains Item does not store config correctly

That condition is not yet committed into 1.2.x, so this may be addressed in that issue instead as long as it's not yet fixed?

@boromino I guess you're using the patch from the related issue? Then, the described behaviour sounds like you're working with a model that contained a previous version of that condition plugin which didn't have the method field yet. In that case, you should remove that condition from the model and add a new one with the fresh version of the plugin.