On DS, after opening an Excel file with characters written in column AA and/or after, an Internal error occurs if you display another Excel file with a View as Excel step of another branch

Situation
　An internal error occurs in Design Studio if the following conditions are met.

Conditions for the error to occur:
　　〇Using a robot file that includes steps such as below:
　　　①A Load File step to load an Excel file with characters written in column AA and/or after
　　　②A View as Excel step to display the loaded Excel content
　　　③A Load File step to load a different Excel file in a different branch
　　　④A View as Excel step to display the loaded Excel content

Example of a robot file:

　〇Executing the steps below in the Design Mode:
　　　Step 1. Executing a View as Excel step in branch 1
　　　Step 2. Executing a View as Excel step in branch 2

Example of a procedure to generate the error:

Solution
　〇Solution 1.
　　Moving to the next branch after closing the window displayed in a View as Excel step with a Close Window step.

　〇Solution 2.
　　Displaying the information after having extracted to a variable with an Extract Source step and not a View as Excel one.