This is expected. By default, when adding an item to the list view outside of the inspector, it will add a "default" item. For reference types, a null item will be added to the list. This will make the bindings for the new item fail since the value cannot be set at the binding path. This behaviour can be configured using the itemsAdded callback of the list view.

For the logs specifically, this is also expected. By default, the editor window will report all bindings errors to the console. This is configurable via the kebab menu on the top right corner of the editor window. You can set the Bindings Console Logs to "Once per result" to reduce the amount of logs received when the error is same update after update and you can set it to "No logs" to not receive any logs at all.