073eee46_n_Memory_Columnar_Store__IMCS___Recommendations
[Parameter name] imcs.project_caching [Description] Cache cs_project results to avoid redundant calculations in (cs_project(...)).* expression. [Default value] true [Recommendations] 
Caching can cause incorrect behavior in some cases: when cs_project is used twice in the same query. In this case disable it: everything should work correctly, may be only with some performance penalty in case of using (cs_project(...)).* construction. Also it is possible to disable caching for each particular cs_project invocation by assigning false to optional disable_caching parameter. Please read more in section Projection issues.
In-Memory Columnar Store (IMCS)
Recommendations