Bug when I double click a relation in object class editor

I’m facing an issue with Pimcore and not sure where to start with figuring out what’s causing it.

If I go to any object in object class editor and double click on one of these type of relations:
Advanced many-to-one
(The red/blue ones, the object relations work fine (the purple ones))

it bugs and can no longer show the different properties of objects until I reload Pimcore.
It looks like this:
Many to one/Many-to-many

Advanced many-to-one

Anyone experienced this before?