Repeater background after loading data (screenshots)

Hi,

This is my repeater as I desinged it in the Editor. It has a degraded opacity effect. This is how it looks in Editor, Preview and Live:

And this is how the repeater looks after gets connected to my dataset. No degraded effect, both in Preview and Live. (Editor is ok because no data have been loaded yet):

Wix Support doesn’t know what’s wrong, as they say. Are there any ideas/culprits/cures Corvid-wise please ?