Comma decimal edit table cell turns to dot

I'm not sure whether this is a bug or an intended feature. I have a table column with decimal values that are correctly displayed using commas. However, when I double-click to edit a cell, the comma changes to a dot, and if I commit the value, it gets saved as an integer in SQL. What I want is for the value to still show the comma as the decimal separator when editing the cell. Is this possible?

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What do you have the column render value set to? I would try setting it to string.