将两个不同大小的文本框内的文字互相复制粘贴会伴有原来的文字字体大小，会带有格式，选中文本框修改样式，粘贴过来的文本样式不随着设置改变

[IGSWL]

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2. Click on '....'
3. Scroll down to '....'
4. See error

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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
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• Version [e.g. 22]

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[nihaojob]

这个逻辑是fabric的内部逻辑，在粘贴文字时，会将历史的样式带过来