Cannot read properties of undefined (reading 'style') when dynamically adding an additional panel

[MaksimAndreevich]

In our application, by default, two panels are used. But on pressing the button of an event one more panel is added.
Panel sizes are also saved in store mobx.

When the component is loaded in the store for the first time, the panelWidths array is saved using onUpdate , but when after that I try to call another panel on click, I get an error

 <PanelGroup
         onUpdate={(e: Array<any>) => {                              // when updating panels, write update state
           accountStore.setSizesPanel(e);
         }}
         panelWidths={accountStore.panelWidthsSettings}               // read state from store
       >

         <Panel0 / >

         {accountStore.isVisibleCustomPanel() ? <Panel1 /> : null}.     // appears on user click

         <Panel2 />

  </PanelGroup>