Steps to reproduce
Go to the String figures article. Open search inside article. Search for cat. Search for cat's cradle.

Expected results
Searching for 'cat' should highlight all instances of the word 'cat' in the article. Searching for 'cat's cradle' should highlight all instances of the term 'cat's cradle' in the article and update the number of search results in the article if there are fewer instances of 'cat's cradle' then 'cats'.

Actual results

Searching for cat	Searching for cat's cradle

Searching for 'cat' highlights all instances of the word 'cat,' however after adding the apostrophe to begin writing out 'cat's cradle' the search results freeze. Only instances of the word 'cat' are highlighted.

This does not appear to happen with any other punctuation.