Text shifts slightly (~1px) when transitioning from underlined version to not underlined version.

[GaryQian]

Type in a text field that underlines unfinished words for autocorrect/context completion. When you push space, the typed word stops being underlined and then shifts ever so slightly to the left.

[GaryQian]

Test app from #20144 that works well to demonstrate the issue:

https://gist.github.com/GaryQian/139f7d8614399d4a096a7d0924a0f7b6

[GaryQian]

The issue does not appear when using a physical keyboard where the autocorrect/underlining is not present.

[GaryQian]

Bug happens when the text is broken up into multiple runs. The layout is not the same when the same text is one run vs split into two runs.

[github-actions]

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