Weird problem with Post Url’s

Greetings friends!

We had this problem for several weeks and we can’t find a way to solve it.

It turns out that these segments are appearing automatically at the end of the links of the posts:

/ Verde Periódico Ecológico and /masverde.periodicoecologico

for example:

https://noticias.masverdedigital.com/la-hora-del-planeta-2018-estara-centrada-en-la-perdida-de-biodiversidad-como-consecuencia-del-cambio-climatico/%20Verde%20Peri%C3%B3dico%20Ecol%C3%B3gico

when the correct link is this:

https://noticias.masverdedigital.com/la-hora-del-planeta-2018-estara-centrada-en-la-perdida-de-biodiversidad-como-consecuencia-del-cambio-climatico/

that extra segment is causing continual 404 errors and preventing our users from accessing the posts.

We do not understand what may be causing the problem, we have already updated the permalinks structure and checked if there was any malware generating the problem but we did not find anything.

We appreciate your help in case someone has experienced something similar.

The page I need help with: [log in to see the link]