Format change to None after line break; how disable word suggestions

Two issues: I am editing a new text document, chose a specific style for the text. Selected all and chose the style as well. if I insert a paragraph break (Return) at the end of a line, then the style switches back to . No idea why.
Strangely, this only happens with this one document. Anyone knowing why that might be so?

Q2: How can I disable those word suggestions which pop up in Composition Mode?



Paragraph formatting styles always return to No Style after a carriage return, unless told which style (including the possibility of “self”) to go to, at the bottom of the style configuration panel.

This said, it is not recommended to style everything. If you used a style for your body text, that is what No Style is actually for.