Hi Alexander
I couldn't find a build for 15.02 to download. 
I have created a standalone project (attached) to test this issue on version Version 15.01.9. The test fails on a clean build for both the finalized and workbench application, so the issue is even worse then I thought. 

But if you force a workbench recompile of routines 

   {EL_READABLE_ZSTRING}.leading_white_space

   {EL_READABLE_ZSTRING}.trailing_white_space

the tests will pass for workbench mode.

To force a recompile: comment out the assignment below for each routine, recompile, then reintroduce the assignment. The test will then pass.

   uc_i := unencoded_item (i + 1)