Automation does not work properly when using Google Calendar as a data source

[イルカのえっちゃん]

As I said in theSubject, why does this happen?

Specify Google Calendar as the data source.

Create the bot shown below.
In this bot, the value of [Title] is set to [Description].

When I add a record, the BOT gets the following error.
And the bot cannot set value to [Description].

However, when editing, the Bot works without any problems and can Set value to [Description].