3116987 - Query on temporary table returns information from fix table with same name - SAP ASE

When query on a Global Temporary Tables (GTT) that uses an existing user table's name, it will succeed without any error. 

Should get an error that the ##table does not exist

select * from ##t1 -- should get

Msg 208, Level 16, State 1:
Server 'myserver', Line 1:
##t1 not found. Specify owner.objectname or use sp_help to check whether the
object exists (sp_help may produce lots of output).

However, a table called t1 results are returned instead.

 c1
 -----------
           1

Adaptive Server Enterprise 16.0

global temporary table issue, GTT name conflict, temporary table error, database troubleshooting, CR 825790, ASE upgrade, global temporary table naming, database error message, Msg 208 error, sp_help usage, table naming conventions , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Known Error