WARNING! Mail Merge Template NOT SAVE "Line Spacing"

WARNING! Mail Merge Template NOT SAVE "Line Spacing"

WARNING! When I create Mail Merge Template (in writer), it's NOT SAVE "Line Spacing".  I save with Line Spacing 1,2 - it's opening with 1,00Single again!
I hope you fix it ASAP, I need it for work
Thank you

P.S. I use Header/Footer, there not working "Different first, even, odd pages", so I can't put different info on pages. And if I decide to cancel header/footer I don't have options