External link is shown with black background when exporting a page

[HiroyasuNishiyama]

External link is shown with black background when exporting or printing a page as shown below.

[kelson42]

@BPerlakiH Is that a problem with the content itself?

[BPerlakiH]

@HiroyasuNishiyama Thank you for reporting this!

@kelson42 it does seems to be a content issue, there are some strange background properties set in css for the external link:

---

when I disabled them, the PDF looks good:

---

Also on non wiki content, the external links looks OK:

[HiroyasuNishiyama]

@BPerlakiH That CSS appears to be checking for SVG support and falling back to PNG.　Please look at here.
In my opinion, this seems to be a bug of WKWebView.

[BPerlakiH]

I did some further investigation on this, and force-loaded the current Wikipedia content into the app (not from a ZIM file), and exported that to PDF, and that looks good. So I think it is purely a content issue:

[kelson42]

I will move the issue to openzim/mwoffliner