About the bugs of the sub-feature name of the library feature

Hello, everyone!

When I insert the first library feature into the part, its name is normal, but when I insert the second same library feature, the sub-feature name in the library feature is wrong.

When I traverse the sub-feature name under the library feature through the API, the wrong result is always returned.

Does anyone know the reason?

my Computer Configuration:

windows 10 64bit Professional Edition

solidworks 2020 sp5

SolidworksApi/macros