Error with Info Box Title & Text Settings

Greetings,

I’ve been all over the forums and don’t see a similar issue to the one we are having. When editing an Info Box – whether existing or new – and trying to access the Title Settings or Text Settings in the right menu, we receive the standard Gutenberg editor error message with the three buttons. “Attempting Recovery” restores the editor but the error is persistent on subsequent attempts. The error returned is thus:

Uncaught TypeError: Cannot read property 'filter' of undefined
    at n (blocks.build.js?ver=1.4.6:1)
    at mountIndeterminateComponent (react-dom.js?ver=16.6.3:14687)
    at beginWork (react-dom.js?ver=16.6.3:15187)
    at performUnitOfWork (react-dom.js?ver=16.6.3:17944)
    at workLoop (react-dom.js?ver=16.6.3:17984)
    at HTMLUnknownElement.callCallback (react-dom.js?ver=16.6.3:143)
    at Object.invokeGuardedCallbackDev (react-dom.js?ver=16.6.3:193)
    at invokeGuardedCallback (react-dom.js?ver=16.6.3:250)
    at replayUnitOfWork (react-dom.js?ver=16.6.3:17231)
    at renderRoot (react-dom.js?ver=16.6.3:18103)

The above error occurred in the <n> component:
    in n (created by t)
    in div (created by PanelBody)
    in PanelBody (created by ForwardRef(PanelBody))
    in SlotComponent (created by Context.Consumer)
    in Slot (created by InspectorControlsSlot)
    in InspectorControlsSlot (created by BlockInspector)
    in div (created by BlockInspector)
    in BlockInspector (created by ComponentWithSelect)
    in ComponentWithSelect (created by Context.Consumer)
    in WithSelect(BlockInspector) (created by SettingsSidebar)
    in div (created by PanelBody)
    in PanelBody (created by ForwardRef(PanelBody))
    in div (created by Panel)
    in Panel (created by SettingsSidebar)
    in div (created by Sidebar)
    in SlotComponent (created by Context.Consumer)
    in Slot (created by SidebarSlot)
    in SidebarSlot (created by Layout)
    in div (created by Layout)
    in Layout (created by ComponentWithSelect)
    in ComponentWithSelect (created by Context.Consumer)
    in WithViewportMatch(Layout) (created by NavigateRegions(WithViewportMatch(Layout)))
    in div (created by NavigateRegions(WithViewportMatch(Layout)))
    in NavigateRegions(WithViewportMatch(Layout)) (created by ComponentWithDispatch)
    in ComponentWithDispatch (created by Context.Consumer)
    in WithDispatch(NavigateRegions(WithViewportMatch(Layout))) (created by ComponentWithSelect)
    in ComponentWithSelect (created by Context.Consumer)
    in WithSelect(WithDispatch(NavigateRegions(WithViewportMatch(Layout)))) (created by Editor)
    in ErrorBoundary (created by Editor)
    in SlotFillProvider (created by EditorProvider)
    in div (created by DropZoneProvider)
    in DropZoneProvider (created by EditorProvider)
    in EditorProvider (created by ComponentWithDispatch)
    in ComponentWithDispatch (created by Context.Consumer)
    in WithDispatch(EditorProvider) (created by Editor)
    in StrictMode (created by Editor)
    in Editor (created by ComponentWithSelect)
    in ComponentWithSelect (created by Context.Consumer)
    in WithSelect(Editor)

React will try to recreate this component tree from scratch using the error boundary you provided, ErrorBoundary.

This is consistent in three different environments, after deactivating all other plugins, after changing themes, and even after deactivating and reactivating Kadence Blocks.

Version info:
Wordpress 5.1.1
Kadence Blocks 1.4.6