I agree that we don't have a fully satisfying explanation of what's
going on.
I investigated a little further and found the following:
1) I can reproduce this problem on a package that contains a dummy
vignette with the following 1-line code chunk:
Hi Hervé,
Many thanks for your help! I modified plotSplicingEvent() to run differently in
non-interactive R sessions. Now, it correctly prints the output in the vignette
without opening the browser! Still, I find it weird that this issue is only a
problem since Bioconductor 3.13 and for
