select the table in WYSIWYG, switch back to Markdown, and click WYSIWYG, an error bug will appear

[yy2012]

Describe the bug

select the table in WYSIWYG, switch back to Markdown, and click WYSIWYG, an error bug will appear

To Reproduce

1. Select any table in WYSIWYG
2. switch back to Markdown
3. click WYSIWYG
4. See error

You can reproduce this problem on this page https://ui.toast.com/tui-editor

Uncaught TypeError: Cannot read properties of null (reading 'totalColumnCount') at t.map (index.js:19100:47) at n.selection.get (index.es.js:701:45) at w.apply (index.es.js:907:15) at UxO+.S.applyInner (index.es.js:1095:37) at UxO+.S.applyTransaction (index.es.js:1028:23) at $t.dispatchTransaction (index.js:23602:38) at V2qZ.$t.dispatch (index.es.js:7400:25) at t.setModel (index.js:23724:15) at e.changeMode (index.js:27534:21) at index.js:23939:30

[ygzhang-cn]

import { TextSelection } from "prosemirror-state";
youEditorInstance.on("changeMode", function (mode) {
            console.log(mode)
            let view, state;
            if (mode == "markdown") {
                view = that.editor.wwEditor.view
                state = view.state
            } else {
                view = that.editor.mdEditor.view
                state = view.state
            }
            if (state.selection.empty) {
                console.log("state.selection is empty")
                return
            }
            if (state.selection.constructor.name != "CellSelection") {
                console.log("state.selection is not CellSelection")
                return
            }
            view.dispatch(
                state.tr.setSelection(
                    TextSelection.create(
                        state.apply(state.tr).doc,
                        state.selection.to
                    )
                ));
        })