Note that that same person on Reddit was attempting to use a text date and shares
I thought that using the text only option would work, but it just does not accept a lot of my input. For example, I type in "(era) 1", that shows up; but if I edit it to be something like “(era) 1, (season name)”, it does not save it and deletes it to be just “(era) 1” the moment I click “OK”.
and uncovered the following issue Confirmed by @daleathan :
So at the moment while prefixing with Stardate or VENUS will work for the initial entry the moment they attempt to edit that entry Gramps silently fails with no error and loses the change !