regular expression doesn't work when find and replace

[ponymushama]

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Describe the bug

• I use regular expression ([。，、……？！：；‘’“”——])\s+ to search all space symbols following these Chinese symbols, it works well.
• Then, I use \1 to replace all space symbols, it fails.
• It just replaces the found results to the plain texts "\1" wrongly.
• It seems that regular expression \1 doesn't work when find and replace.

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Desktop (please complete the following information):

• OS: macOS Sonoma 14.2.1 (23C71)

Typora Version

• 1.8.5 (7106)