How to hide a blue line when typing text?

Check the screenshot. The problem is that I want to hide/remove this text typing crossline. This line is really annoying me to select the fonts when this crossing the text because I love using exactly this way of center align for rounded text. This blue color is not a color of rounded text or type on path or stroke, but the color of any text underline. But When it aligned to center it crossing the text.

2 hours I can't solve this easy problem. All what I found is that this blue color is a layer color and I can change it on layer panel with double click on layer and then layer options opened. But I can't set it to transparent...