SR26893 - COM: polylines were not correctly regenerated after changing the polyline type.
SR30156 - LISP, SDS, BRX: improved WcMatch() performance, which in turn improves SsGet() performance.
SR31088 - Object Properties Manager did not show the Display Name when multiple custom object instances were selected.
SR31391, SR31842 - LISP: when INSERT command was issues by Lisp/SDS, redefining an
existing block (using syntax "name=file.dwg") failed.
SR31282 - BRX: after insert, objects copied in beginDeepCloneXlation from source database were erased in destination database.
SR31312 - .NET undo problem: transactions run outside of a command were not properly closed,
possibly leaving objects open for write until the drawing was closed.
SR31403 - LISP: lock-up or access violation could occur if SDS/BRX code called a Lisp function
via sds_invoke()/acedInvoke(), and the Lisp function returned a list containing Lisp symbols instead of values.
SR31744 - COM: AcadLineType type was missing.
SR31764 - LISP: reimplemented (_vl-times) function. (this fix was announced in 12.1.2 but not included yet).
SR31764 - LISP: accessing a COM method via (vlax-invoke-method) could fail - regression introduced in V12