react-native-calendars onEventPress returning undefined

I have created TimelineList using react-native-calendars and I’am trying to get onEventPress to work, but it keeps returning undefined.

I defined the function that handles the click like this:

    handleEventPress: TimelineProps["onEventPress"] = (event: Event) => {
        console.log(event);
    };

I then binded the function to the props like so:

    private timelineProps: Partial<TimelineProps> = {
        format24h: true,
        overlapEventsSpacing: 8,
        rightEdgeSpacing: 4,
        renderEvent: this.renderEvent,

        onBackgroundLongPress: this.handleBackgroundLongPress,
        onEventPress: this.handleEventPress,
    };

and they are then used in my component like so:

<TimelineList events={this.state.events} timelineProps={this.timelineProps} showNowIndicator scrollToNow />