Microsoft Lists UI inserted in default SharePoint List View

Hi!

All the sites, subsites and lists we have in SharePoint Online have been configured for the modern experience and everyone has been using them without any problems.

But I received a call from a specific user who recently, when trying to access a certain list, saw the display in a different way, with the appearance of Microsoft Lists, but inserted in the default list, very strange..

Informations:

• Operating System: Windows 10
• Browser: Microsoft Edge, latest version Unsuccessful attempts: - Completely clear all browser cache

Notes:

• The user does not have the Microsoft Lists application installed on their computer or smartphone

All users normally see it like this:

But the user who has the problem sees it like this:

One thing I checked here on our sites is that of all list types, the only type that is undergoing this update is { id: 100, name: 'Custom List' }.

The other types are not affected.

ListBaseTemplates = [

{ id: 100, name: 'Custom List' },

{ id: 101, name: 'Document Library' },

{ id: 102, name: 'Survey' },

{ id: 103, name: 'Links' },

{ id: 104, name: 'Announcements' },

{ id: 105, name: 'Contacts' },

{ id: 106, name: 'Calendar' },

{ id: 107, name: 'Tasks' },

{ id: 108, name: 'Discussion Board' },

{ id: 109, name: 'Picture Library' },

{ id: 110, name: 'DataSources' },

{ id: 115, name: 'Form Library' },

{ id: 117, name: 'No Code Workflows' },

{ id: 118, name: 'Custom Workflow Process' },

{ id: 119, name: 'Wiki Page Library' },

{ id: 120, name: 'CustomGrid' },

{ id: 122, name: 'No Code Public Workflows' },

{ id: 140, name: 'Workflow History' },

{ id: 150, name: 'Project Tasks' },

{ id: 600, name: 'Public Workflows External List' },

{ id: 1100, name: 'Issues Tracking' }

]

Now, when you create a new blank list of type { id: 100, name: 'Custom List' } in SharePoint Online, it comes with the Microsoft Lists UI.

If you create a list of type { id: 1100, name: 'Issues Tracking' } and other types, the modern UI is maintained.

How to solve this problem?