Tabstop - No unique delta format

[voodoohoo]

Typing a single Tab without defining Tabstops leads to the delta format

[{"insert":"\t\n"}]

Typing a single Tab with a defined e.g. Left Tabstop leads to

[{"attributes":{"tab":"1"},"insert":""},{"attributes":{"line-part":true},"insert":""},{"attributes":{"tabs-cont":"TABS-CONT"},"insert":"\n"}]

This is a really odd behaviour and should be harmonised.
I think Tabstops should always be attributed like {"attributes":{"tab":"_count_"},"insert":""}