Hi there @onanart! Actually the Wintab with direct packet processing is not tested as much as we would like. Do you know if your issue happen on v1.2.27? But I think it should happen in the stable version too.
I would recommend you to use the regular Wintab mode or the Win8 pointer API if you can. Anyway I’ve taken note about this on Github.
About the other bug, I think it might be related to this issue that was fixed in v1.3-beta3.