When using spans.manual with --highlight-chars there appears to be a bug, which is that for the second and following labels the last character of the text can not be selected. Here is a picture which illustrates what I mean:
As you can see for Labels B and C the last character is missing and couldn't be selected. However it works when omitting the --highlight-chars-Flag.
Hi! Which browser are you using? It's possible that this is related to how different browsers/versions handle the native selection of whitespace, in which case we'd have to find a browser-specfic workaround for this.
In the meantime, could you try it with Chrome if you were using Firefox, or Firefox if you were using Chrome and see if that solves it?
Hi Ines! You are right, it does indeed work with Firefox but not with Chrome.