Error: Value is null when using createPositionLine without delay

[money-development]

Error: Value is null when using createPositionLine in TradingView Widget

Description:
The following code throws an error:

Error: Value is null.

window.tvWidget.onChartReady(() => {
    window.tvWidget
        .activeChart()
        .createPositionLine();
});

However, adding a delay resolves the issue:

window.tvWidget.onChartReady(() => {
    setTimeout(() => {
        window.tvWidget
            .activeChart()
            .createPositionLine();
    }, 500);
});

Expected Behavior:
createPositionLine should work without needing a delay