Known Issue in this Eden 0.0.10c (which was released "quietly" because the bug fixed concerned only analyzing in UCI, which few people besides myself will use):
In WB, "force" mode doesn't work properly (Eden just ignores it and thinks it is in non-force mode). That will lead to the following events:
WB: force
...
WB: e2e4 [Eden starts thinking already, when it shouldn't, and immediately returns the book move, e7e5]
Eden: move e7e5
WB: go
Eden: [will start thinking about this new position, and return Nf3 from the book] move g1f3
WB: : move g1f3
Ignoring move out of turn by second, gameMode 5, forwardMost 2
..and it goes downhill from there
This occurs in WB (and not all versions of it? => varying reports whether it works or not) only, not in Arena, as Arena doesn't set force mode.
Workarounds: Use Eden in UCI via Polyglot, or somehow disable force mode in the GUI.
It would be nice if someone could find out exactly when this occurs; it'll get a fix out sooner (because then I won't have to do three things concurrently).