QTextBoundaryFinder::Sentence is returning two sentences if string has a word with capital letters followed by comma

QTextBoundaryFinder, when used with BoundaryType Sentence, is breaking the sentence when there is a word with all capital letters followed by comma. E.g.

text = "This is a normal thing, another thing."  --> returns one sentence
text = "This is a normal THING, another thing."  --> returns two sentence

Which seems to be unexpected behavior.