Recently I started to use the lifespan module. There it is easy to find persons that miss dates for birth and death. But when I click on the names, clearly indicated as links, the same page is reloaded, which is not what I had expected. After some experiments I realized that the link was "#" which gives that result. By removing the hash mark a much better effect is achieved: a small popup window with the persons name, birth date and death date appears. The name in there
is a link to that person's individual page. Probably this was the intention from the beginning.
A patch is included (lifespans.txt). The exact definition of how href="" shall be interpreted has not been found, but it works in Firefox, Chrome and Edge. When hovering with the cursor over a name it is highlighted as a link, which is good. If href="" is completely removed the name is not shown as a link when hovering over it although it is still clickable, which is not intuitively clear.
I use webtrees 2.1.7 on desktop PC with Linux (Ubuntu 20.04.5 LTS). Actually it works without patch when I try version 2.0.19 which I still have installed!