When multiple user assigned identities are added to a logic app, designer stops working on portal

### Describe the Bug with repro steps

When multiple user assigned identirties are added a logic app, designer stops working on portal
Documentation says, it should work

https://learn.microsoft.com/en-us/azure/logic-apps/authenticate-with-managed-identity?tabs=consumption#managed-identity-differences-between-consumption-and-standard-logic-apps

### What type of Logic App Is this happening in?

Standard (Portal)

### Are you using new designer or old designer

New Designer

### Did you refer to the TSG before filing this issue? https://aka.ms/lauxtsg

Yes

### Workflow JSON

_No response_

### Screenshots or Videos

_No response_

### Browser

All

### Additional context

It says that multiple user-assigned identities can be added to the Logic App, so I would expect the designer to still work then.

It also says that only one managed identity can be used at a time. I'm not too sure what they mean here. Whether you can only use 1 identity in a flow, or only 1 specific one in an action.
```[tasklist]
### Tasks
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