Captions show in three languages with code

Hello,
Thank you for your great plugin.
I have a page with many images using the native WordPress gallery.
I use two translations on the site.
On the Admin Media Library page, I added captions to each image and the translations for the two other languages. I did this one by one and updated each image page with the captions. Each page appeared to have saved correctly.
When I opened the web pages, the captions were shown in the three languages under each image in the coded format on each page,
e.g. {:gb}July 22 – 1{:}{:nl}22 juli{:}{:id}22 Juli{:}
I have had similar issues before, but usually they are corrected by re-entering the text and saving, however, deleting, repeating and updating does not fix the problem. How can I prevent this from happening and just get one language on each page.

WordPress ver. 6.3, PHP 8.0.28.