commit work in each roundtrip?

Hello,

i've found strange behavior of WebDynpro and don't remember that i've seen this behavior before on other customer Systems:

I've have a little demo application with one view. This view has two Buttons, EDIT and cancel. Now when clicking EDIT, i perform an insert on a Z-Table. When clicking CANCEL, i wanted to ROLLBACK the insert. But after the EDIT roundtrip is finished, there will be a COMMIT which can be seen in ST05:

09:10:53.314 215 SAPMHTTP  EXECSTA  0 0 0 R/3 COMMIT WORK ON CONNECTION 0

Can someone please verify this? I don't have Access to other SAP Systems, therefore i don't know if this is a bug or normal behavior.

Thx and Regards

Christopher