After pressing Enter Tabulation cancels?

Why if I press Tabulation than the first symbol in sentence is dash “-”, than Space, than typing words of my sentence and after I’m pressing Enter, Tabulation cancels?
I’m using this when I make a dialog taping my novel.

This is a consequence of AutoCorrection.

One of the options enabled by default removes Tab and Space at the beginning of lines.

If you don’t like it (or any other AutoCorrection option), you can customise the behaviour with Tools>AutoCorrection>AutoCorrection Options, Options tab.

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