Compiler fatal error in user project

Compiler issue in a user project with LPP_v16.8.0_4_CNL113685 and Titan 10.1.1:

FATAL ERROR: /proj/git_workspace/pdupc/enszeoh/nfaat-master/test-runner-packet-core/src/test_service_5G/test_executor/native/titan/bin/compiler: In line 1633 of Type_codegen.cc: Type::generate_code_Choice - invalid field type 27

/cc @aknappqwt @mmagyari