Why does Dreamweaver regex replace some word into a wrong word?

Why does Dreamweaver regex replace some word into a wrong word?

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In short:

1. if you use a regex pattern contains an `or` syntax, `|`, eg:

(( and )|( that ))

2. and your replacement contains a capture group `$1`, eg:

$1foobar

3. and you perform an regex replace all in Dreamweaver 

some text could be replaced with the wrong String, due to the `|` in the regex pattern. eg:

AA and BB

it should be replaced into

AA and foobarBB

but it may be replaced into 

AA that foobarBB

which is wrong.

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I had the exact same issue as what this web link describes (I reformated the simplified example from that link to above)

https://superuser.com/questions/1725719/dreamweaver-regex-replace-into-a-wrong-character-how-to-avoid 

(For more detials, please view that link, it has better description and image.)

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I am using Dreamweaver 2021 (Version 21.2) 

OS Windows 10

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(If someone test it, and you can / cannot reproduce the issue, please let me know. 

And please let me know what version of Dreamweaver you are using that doesn't have such issue.)