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Track changes view toggling not working properly

I am performing a review and I usually work in 'No markup' view mode (i.e. track changes are not shown, I am viewing the final result).

What is happening is that as soon as I type in the target column, the view switch to 'Show track changes'. Why is this happening, all of a sudden?

I am using SDL Trados Studio 2019 Freelance 15.1.0.44109.