Macros are reproduced in document when macro is run

I have encountered a behavior today that I have never seen before.  I have experience with Word macros, but I am running a new machine with Office 365 and Windows 11.    

This morning I (quickly) created a down-and-dirty macro using "Record macro".  Nothing radical; really simple.

Each time I run this macro, however, all the macro coding is added to the document over which I have run the macro. 

Apart from this odd behavior the macro works, but what is this about and how do I fix it?  Very weird. 

Thank you!