One problem I noticed was that
when I selected a chapter from title 2,
it named the chapter raw_chapter1_1 instead of raw_chapter2_1.
It is extracting the correct track but always naming it as
if it was coming from title 1.
This means that if I choose more than 1 title at a time,
the second and subsequent title's chapter will overwrite the previous one.
Answer:
The new version have already released and revised the bugs you mentioned.You can have a try!