Why does a lookbehind with replace not function?

Question

The (?<!^)Business Service lookbehind (with Match Case enabled) to replace uppercase " Business Service", except at start-of-line, with lowercase "business service" does not perform any change,

Business Service as simple term (without lookbehind), however, matches correctly.

Paul · Accepted Answer

Anthony Rudd Lydia Simplicio Oana Nagy 
 This one is already logged under our reference CRQ-25500. We don't have a fix date, but it is logged.

Lydia Simplicio · Answer

Anthony Rudd , Oana Nagy and I will get back to you on this one as I will also check to see how SDLXLIFF behaves. In the meantime thank you for your clear details.

Daniel Hug · Answer

Anthony Rudd 
 Why not use ^Business Service instead?

Daniel Hug · Answer

Anthony Rudd 
 Either change all and then use ^business service to change only those back to former spelling. Or use (.)Business Service and replace with $1business service . 
 Why does lookbehind not work? I don't know. But I think both suggestions above would work in your case. 
 Daniel

Trados Studio > 5. Regex and XPath

Why does a lookbehind with replace not function?

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