【regex:(?<=a)b】Don't work

[Learning Regex]

【regex:(?<=a)b】and【regex:(?<!a)b】don't work.
But it works with【Ctrl+R】【(?<=a)b】and【(?<!a)b】?

[void]

Everything will break the regex term at <


Please escape < with double quotes.
Please try the following:
regex:"(?<=a)b"
regex:"(?<!a)b"



The next major version of Everything will not break the regex term at <

[Learning Regex]

OK! THANK YOU!