3616219 - Some free pages cannot use after BCP IN with Large Scale Allocation - SAP ASE

Under "number of pre-allocated extents" is set to 32, some free pages cannot use after BCP IN with Large Scale Allocation.
DBCC GAM with check mode may report the below messages:

The bit for alloc page NNNN in database N is set. It should be clear.
The bit for alloc page NNNN in database N is set. It should be clear.
The bit for alloc page NNNN in database N is set. It should be clear.
The bit for alloc page NNNN in database N is set. It should be clear.

SAP Adaptive Server Enterprise 16.0

bcp, bcp in, bulk copy in, LSA, Large Scale Allocation, gam, Global Allocation Map, free page, the bit for alloc page , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Problem