Set billing hours to 0 in timesheet

Hi guys!

I think there is a problem with the billing hours in the time sheet. Every time I uncheck the bill in an activity, it is still in the print view. See the following 2 pictures.

It would not be a problem, but when i try to set the billing hours to 0, it sets it automatically to 1 after saving the time sheet. I can set it to everything different than 0. Also negative values but not null. See next picture.

I really need this function, because sometimes i have activities, i cant sell to my customers, but i want it in my time sheet for reporting.

Hope someone can help me.

Best regards,

Christoph K.

Following suggest that it is not possible for now.

Can you please create Github Issue for this?