Project macros not recognized in Project Explorer

I have disk structure like this

/firmware/platform/nRF/SDK_16.0.0/SDK/...
/firmware/platform/nRF/SDK_17.1.0/SDK/...

some macros to fit the structure

SDK=SDK_17.1.0

Solution file uses the macros to identify correct files, according to chosen SDK version

e.g.

  <file file_name="../platform/nRF/$(SDK)/SDK/components/ble/common/ble_advdata.c" />

Compilation works fine, but Project Explorer doesn't show files in folders, only count of them.

All files with the macro expansion in its path do not show in Explorer, files with pure path are ok.

In CW 5.0 it worked correctly, this error is since version 5.1.

Tomas