transition animation does not work in combination with modeBarButtons config enabled

When modeBarButtons is used in the plot config, transitions refuse to animate. This seems like a bug since transitions DO work whilst i.e. using modeBarButtonsToRemove in the config.

Simple example that shows the combination that breaks the transitions:

                        <Plot
                            data={data}
                            layout={{transition: {duration: 300}}}
                            config={{modeBarButtons: [['toImage']]}}
                        />

先使用 layout.transition 和 config.modeBarButtons 从提供的 JSX 复现开始，然后将其与正常工作的 modeBarButtonsToRemove 案例进行比较。跟踪 transition 和 mode-bar 配置路径；当启用 modeBarButtons 时 transition 能够播放动画，且正常工作的配置没有回归时，即表示完成。