Possible new issue with solveTree! resetting already initialized values back to zeros after solve. Discovered during DERelative work, Easier MWE in existing test here:

• https://github.com/JuliaRobotics/IncrementalInference.jl/pull/1774/files#diff-7a442c12d006f1f49fa47bd13a56a79a6cccb1ad9a42c79265db3b9e0f0a9de1R421-R425