Wrong page title in single page of category and keyword

Hello

I have just noticed a mistake that occurs since version 5.8.1.2.
I am using version 5.8.1.3.

It will display a wrong page title in the pages. The page title as title in the head is correct.

Here it is still correct
http://www.liquidum.eu/akademie/veranstaltungen/kategorien/

Here it is wrong:

Instead of “Kontaktformular (placeholder)” would have to be “Kategorie – advoconcept”
http://www.liquidum.eu/akademie/veranstaltungen/kategorien/advoconcept/

Instead of “Startseite” it says “Schlagwort – Akademie-Aktuell” read
http://www.liquidum.eu/akademie/veranstaltungen/schlagworte/akademie-aktuell/