Problem with Vizlib Container in Mashup after update to new release November 2020

 Hi:

We've updated to the new Release (November 2020), but we have a problem in mashup: Vizlib Containers aren't displayed in Mashup. Their place is empty.

However, in Qlik Sense, Vizlib Containers work correctly and you can see them with theirs objects.

What happen in mashup?

Regards.