bound style attribute is not reflected

[syuilo]

Version

3.2.0-beta.1

Reproduction link

sfc.vuejs.org

Steps to reproduce

This is a problem that has occurred since 3.2.0-beta.1.

Bound style attribute is not reflected.
And interestingly, if you add an empty style attribute, the bound style will be reflected.
e.g.

<h1 :style="`color: ${x};`" style="">Hello World!</h1>

See minimal reproduction.

What is expected?

bound style attribute will be reflected

What is actually happening?

bound style attribute is not reflected

[syuilo]

Probably the reason for this is that the handling of the case where the style is a string is missing here.

Or maybe don't even need to generate the code to call normalizeStyle at the compilation stage.