ExtJS 6 plugin.rowwidget Row body component persist on grid reload

Question

I have a grid with Ext.grid.plugin.RowWidget. When grid store reloaded I expect all row body components to be recreated, but they remains.

Here is simple fiddle, to repeat the bug:

1. Expand first row;
2. Change value of any textfield;
3. Click 'Reload' button;
4. Expand first row.

I expect new Ext.CharacterPanel instance with empty fields as row body component...

It's a huge bug imo.

As temporary solution I can reset row body component on expandbody event or with onWidgetAttach method, but it seems like bad solution for me.