Bug: sbb-menu, using keys to navigate produces error

[kyubisation]

TypeError: Cannot read properties of undefined (reading 'focus')
at SbbMenu.handleKeyDown (sbb-menu.entry.js:93:1)
at HostElement.eval (index-6bc740f4.js:1892:1)
at HostElement.nrWrapper (de:6:15742) undefined

Happened on beta.sbb.ch in language chose menu -> they have own list implementation, maybe related?

Caused in:

handleKeyDown(evt) {
if (!isArrowKeyPressed(evt)) {
return;
}
evt.preventDefault();
const enabledActions = Array.from(this._element.children).filter((e) => e.tabIndex === 0);
const current = enabledActions.findIndex((e) => e === evt.target);
const nextIndex = getNextElementIndex(evt, current, enabledActions.length);
enabledActions[nextIndex].focus();
}