How do I get YouTrack field fixed in build filled out using TeamCity integration?

How do I get YouTrack field fixed in build filled out using TeamCity
integration?

I am trying to get integration between our YoutTrack and our TeamCity
working. However I cannot get YouTrack to fill out the "Fixed in build"
field:
Using TeamCity 7.1.3, YouTrack 5.0.2.
TeamCity integration setup points out the "Build Field" to YT's "Fixed in
build"
YouTrack correctly shows TeamCity builds in tab "TeamCity Changes".
User names map correctly.
YouTrack commands by VCS commit comments work correctly.
Simple YouTrack issue referencing from commit comments works correctly.
However, no matter what I seem do to, the "Fixed in build" field remains
at "Next build".
I tried checking the "Add each build to list" in YT setup. Now the build
numbers correctly goes into the Build bundle, but still "Fixed in build"
is not set. I also tried with both open and closed issues with no effect.
Any idea what I am missing?