Tooltips don't always work
When looking at the attached report: DocumentReport.pdf Tooltips work fine in Adobe Reader and Okular. It also worked better a few years ago in Evince, but it seems there is a regression lingering for a while now.
I looked at it in a bit more detail. The PDF hyperlink/tooltip is created using JasperReports+DynamicReports using this code: https://github.com/dynamicreports/dynamicreports/issues/90 (with a workaround via mangled reference hyperlinks, since raw tooltips don't work with JasperReports)
When opening the document in Evince, tooltips don't seem to work. Though if you go through the TableOfContents to a given page and then look at tooltips, they suddenly work. So I guess this might be an error with scrolling/navigation which might use the wrong coordinates to draw the tooltips (which might then appear off-screen/invisible). It seems to be fixed by following a LOCAL_ANCHOR hyperlink which might reset some viewport coordinates to fix the rendering of tooltips. Also when reopening the document from the same location, evince jumps back to the previous page and tooltips don't work again. One has to go via the TableOfContents again to fix this.
Also in the past it was possible to click on a broken link and see the target address for any link (the tooltip to be read). Nowadays there is only a generic error message regarding unsupported external links in some cases. So this is also a slight usability regression: vs:
Here what the tooltip looks like (after the TableOfContents workaround):
I am using Ubuntu 21.10 with Evince 40.4, but this problem is present since a few years now.