Polymorphic association fields in form clusters have a UI glitch

[jetienne]

Describe the bug

Using polymorphic association on clusters do not work well on form, there is a UI glitch:

https://www.loom.com/share/57c6780cc7124aa9909395fb837a60a0

Steps to use in the reproduction repository

Create a form with this type of cluster:

          cluster do
            field :client, as: :belongs_to, can_create: true,
                  polymorphic_as: :client,
                  types: [::Contact, ::Company], searchable: true
            field :client_intermediary, as: :belongs_to, can_create: true,
                  polymorphic_as: :client_intermediary,
                  types: [::Contact, ::Company], searchable: true
          end

System configuration

Avo version:
3.19.3

Rails version:
rails (8.0.2)

License type:

• Community
• Pro
• Advanced

Are you using Avo monkey patches, overriding views or view components?

• Yes. If so, please post code samples.
• No

Screenshots or screen recordings

See Loom

Impact

• [] High impact (It makes my app un-usable.)
• Medium impact (I'm annoyed, but I'll live.)
• Low impact (It's really a tiny thing that I could live with.)

Urgency

• High urgency (I can't continue development without it.)
• Medium urgency (I found a workaround, but I'd love to have it fixed.)
• Low urgency (It can wait. I just wanted you to know about it.)