Thunar shortens my folder names

Hi! I've been using Thunar (thunar 4.16.5-1 and thunar-volman 4.16.0-1) for several months but for some just recently it started shortening the names of some of my folders.

In that image you can see how my folders "Estructura de la Materia 2" and "Estructura de las Materia 3" are shortened both to "Estructura de la", which is annoying and confusing. For some reason I noticed that if I were to make another folder like "this is a folder with a really long name" then the folder fixes itself!

But if instead of naming that folder "this is a folder with a really long name" I name it "Estructura de la Materia 4" then the problem reappears! I've found out that the problem arises from the amount of characters this folders have and from the fact that there are spaces in the name. If I add or remove characters and/or change the spaces for the dashes then the problem disappears.

I created a second user and curiously it works fine that way, it doesn't shorten the names. Same thing if I use Thunar with superuser. So the problem only exists for my user.

I asked about this in the forum and the mod suggested that I create this bug report. You can see the conversation here. I'll leave my system specs in case it is useful: