matplotlib 3.7 brakes plotting

还没有人认领这个 Issue。

## Describe the issue

i do first plot in cell, than try to plot a second plot in a new cell, each starting with "%matplotlib widget".

matplotlib 3.6.x : both cells have separate independent plots
matplotlib 3.7.x: the plot from second cell gets added to the plot of first cell, only one plot as whole is generated. If I try to add this plot to the output tab - the plots completely disappear without any error message.

## Versions

jupyterlab: 3.5.x and 3.6.x - didnt make a difference
ipympl: 0.8.x and 0.9.2 - didnt make a difference

I am not sure if this is the right place for this, since this is linked to matplotlib though.

首先，使用“%matplotlib widget”，在报告的 JupyterLab、ipympl 和 matplotlib 版本组合下复现这两个 notebook 单元格。比较 matplotlib 3.6.x 和 3.7.x 中独立绘图的行为，包括将结果添加到输出选项卡；完成的标准是两个单元格保持独立，且绘图不会消失。

由索引模型根据 Issue 内容生成。