3342754 - SP05.05, LOAD job encounters Non-Fatal error at 's_ohcidx.cxx:13993' , with 'hs_idxexception::hs_idxexception' - SAP IQ

On SAP IQ16.1 SP05.05, while running 'LOAD Table … Using File' (multiple input files) statements to number of different tables, it frequently fails with Non-Fatal error at s_ohcidx.cxx:13993. Key stack symbols are 'hs_idxexception::hs_idxexception' , 'hs_ohcMerge' & 'dfo_THGMerge'. But subsequent resubmit the same load job works fine.
This problem was not happened at all when testing on SP05.01, only it appears on PL05. Following is stack of Non-Fatal error.

.. ********************************************************
.. **
.. ** Non-Fatal IQ Internal Error Detected
.. ** at slib/s_ohcidx.cxx:13993 on thread 140105443047168 (TID 120)
.. **
..
.. StackTraceForThisThread(char const*, ..
.. hs_idxexception::hs_idxexception(char const*, ..
.. hs_ThrowIdxException(char const*, ..
.. hs_ohcMerge<s_btdiskblock, ..
.. dfo_THGMerge::FetchOpus()+193 ..
.. dfo_Scheduler::ExecWork(int&, ..
.. workAllocator::DoWork(unsigned int)+c4 ..
.. hos_team::StartWork(void (*)+e9 ..
.. hos_team::Exec(hos_workIter&)+41 ..
.. dfo_Scheduler::FetchOpus()+5e ..
.. dfo_Root::FetchOpus()+1ba ..
.. dfo::Fetch(), ..
.. db_dmlcommand::ExecuteDFOTree()+c8 ..
.. db_LoadTable::Execute()+ab ..
.. st_command::DoCmdThroughResourceGate()+ ..
.. st_iqdml::Load(a_statement*, UIConnection*, ..
.. UIQDML_Load+1c ..
.. st_SAIQInterfaceInfo::callFunction(), ..
.. st_SAIQInterface::RunIQFunc(st_SAIQInterfaceInfo*), ..
.. st_SAIQInterface::Execute(int, ..
.. saint_iqthresholddml::Load(a_statement*, ..
.. dbi_load_table(a_statement*, ..
...

SAP IQ16.1 SP05 PL05

s_ohcidx.cxx, hs_idxexception , hs_ohcMerge, dfo_THGMerge, , KBA , BC-SYB-IQ , Sybase IQ , Problem