Question: Wrong maple output, shows apostroph in the variable

Hi,

So I've just installed the 2022 version of Maple and I wanted to make a new document.

But when I'm trying to make a variable with a subscript that includes a comma, I get wrong output.

For example; I want to make the variable Ab,c as 2D input and then it shows 'Ab,c' as output.

Why are those apostrophs showing up?

Thanks for the help

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