outerjoin not joining after window

Hello,

I have a KStream to KStream outer join with a time difference of 25 minutes
and 5 minutes of grace. When I get a record for one side of the join, but
don't get a record on the other side of the join, I expect the join to
execute after the 25 with one side of the join containing a record and the
other being null. Is that correct? If it is correct, it's not working for
me.

I was poking around on the broker and saw some internal topics. I see the
key I expected to execute the join on some of those topics. One has a
naming convention of "KSTREAM_OUTERSHARED". I see a record there, but I'm
not sure how to decode that message to see what is in it. What is the
purpose of those messages? If I decode the message will it help me see when
the join should have been executed?

I also see the key on a topic with the naming convention
"KSTREAM_OUTERTHIS".

Are there any other topics that I should be looking at to troubleshoot this
issue?

Thanks,
Chad