This is an example of preventing enter key event of the GridPro cell editor bubbling to Shortcut listener hooked to GridPro.

GridProView.java

package com.example.application.views;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

import com.vaadin.flow.component.Key;
import com.vaadin.flow.component.Shortcuts;
import com.vaadin.flow.component.UI;
import com.vaadin.flow.component.button.Button;
import com.vaadin.flow.component.combobox.ComboBox;
import com.vaadin.flow.component.confirmdialog.ConfirmDialog;
import com.vaadin.flow.component.dependency.CssImport;
import com.vaadin.flow.component.grid.Grid.SelectionMode;
import com.vaadin.flow.component.gridpro.GridPro;
import com.vaadin.flow.component.html.Div;
import com.vaadin.flow.component.textfield.TextField;
import com.vaadin.flow.dom.DomListenerRegistration;
import com.vaadin.flow.router.Route;

@Route("gridpro")
@CssImport(value = "./empty.css", themeFor = "vaadin-text-field", include = "lumo-grid-pro-editor")
public class GridProView extends Div {

    public GridProView() {
        GridPro<Bean> grid = new GridPro<>();
        grid.addColumn(bean -> bean.getValue());
        TextField field = new TextField();
        field.addThemeName("grid-pro-editor");
        DomListenerRegistration keyReg = field.getElement()
                .addEventListener("keydown", e -> grid.getElement()
                        .executeJs("this._stopEdit(false,true);"));
        keyReg.addEventData("event.keyCode");
        keyReg.addEventData(
                "([13, 10].includes(event.keyCode)) ? event.stopPropagation() : undefined");
        keyReg.setFilter("[13, 10].includes(event.keyCode)");
        grid.addEditColumn(Bean::getValue).custom(field, Bean::setValue)
                .setHeader("Text");
        List<Bean> beans = Arrays
                .asList("Hello", "World", "I", "am", "feeling", "good!")
                .stream().map(s -> new Bean(s)).collect(Collectors.toList());
        grid.setItems(beans);
        grid.setSelectionMode(SelectionMode.SINGLE);

        Shortcuts.addShortcutListener(grid, e -> {
            ConfirmDialog dialog = new ConfirmDialog();
            String value = grid.asSingleSelect().getValue() != null
                    ? grid.asSingleSelect().getValue().getValue()
                    : "nothing here";
            dialog.setText(value);
            dialog.setConfirmText("Ok");
            dialog.open();
        }, Key.ENTER).listenOn(grid);

        ComboBox<Bean> combo = new ComboBox<>();
        combo.setPageSize(100);
        List<Bean> items = IntStream.range(0, 140)
                .mapToObj(i -> new Bean("Item " + i))
                .collect(Collectors.toList());
        combo.setItems(items);
        combo.setItemLabelGenerator(b -> b.getValue());
        add(grid, combo);
    }

    public class Bean {
        private String value;

        public Bean(String value) {
            this.value = value;
        }

        public String getValue() {
            return value;
        }

        public void setValue(String value) {
            this.value = value;
        }
    }
}