first item (sometimes) blank

[Tuginho]

On some pages, the slider shows the first element blank.
This happens if I'm clicking direct on the url or if I'm refreshing the page.
(The blank element is initially added to the other elements.)

attaching urls here - but may delete later
deleted

[LeonidIvanov]

Same thing. It appears every time for me but only in the production build.
When starting server in development mode there's no such issue.