Highlight with unexpected results

[doppelrittberger]

Hey

I use your cool library for fulltext search and tried using the highlight feature. Seems working mostly fine but I found some examples which I cannot explain.

I created a test here:
flexsearch.html

If you run this you will see it searches for start of german word "urlaub" (vacation) and the first highlight is perfect:
Be<b class='xyz'>urlau</b>bung.
The second highlight instead appears to be wrong:
auf-<b class='xyz'>beurl</b>aubung

I would expect the second highlight like this:
auf-be<b class='xyz'>urlau</b>bung

Is there any chance you could give me a hint about what I'm doing wrong?

Thanks in advance

[doppelrittberger]

One additional hint: it seems the brackets are causing the issue. If I remove any of them "(" or ")" it works like expected. Any chance I can fix this with some settings?