Davinci2 is not very child theme friendly. With the last two updates I have had to re-edit new files from the updated mother theme. First the header.php, then the front-page.php. Also, the child theme does not import the colours from the Customization. I have only started to make a child theme for Davinci2 recently.
I have already mentioned these problems in the update thread but have had no response so far.
I have now given up with a Davinci2 Child theme and am editing the mother theme files directly and adding CSS changes to Appearance>Customize>Additional CSS. I shall keep the edited files in a folder and upload with each theme update.
If it continues that each update needs fresh files re-edited ... I'll give up on Davinci2 completley and go back to my Davinci1 child theme which has none of these problems.
I think Davinci2 just wants to be left alone and not changed via a child theme ... lol