Button block has lost the ability to add styles for different states such as hover

Symptoms

The Button block style settings includes the option to set different styles for different states, such as hover.

The UI for adding those styles has disappeared.

Workaround

Recent versions of Toolset Blocks have included updates in response to breaking changes in the core WordPress block editor, and it looks like the loss of this part of the UI was an unintended consequence of that.

We are working to restore this and will have an update soon.