Parameters not accepting values after reset with bookmark

Hi, 

I have a page with paramaters (there a multiple) and a button "Reset" with bookmark (applied onlty for parameters) for that paramater to revert them to 0. However, when i enter values and then I want to reset all paramaters to start over again to enter values the values are not accepted (they go back to 0).

Am I doing something wrong or is this a software bug?

Basically what I want to have are a few parameters that I can reset with one button (to not clear each parameter)  so I can enter the values again (Reset to defult is not an option)