Oxid 6.0.1 - adding pictures to banners not working

I encountered a problem, when you try to change or assign a picture to a banner in Customer Info -> Promotions it doesn’t work in Oxid 6.0.1 and 6.0.2. I inspected code and found that in previous versions method save() in the class ActionsMain has a line

$oPromotion = \OxidEsales\Eshop\Core\Registry::getUtilsFile()->processFiles($oPromotion);

And this line is missing in 6.0.1 and 6.0.2. I created new project of version 6.0.1 and tried to change banner pic and it didn’t work. Is it a bug?

Already solved https://bugs.oxid-esales.com/view.php?id=6787