Spinnner tool doesn´t working with negative numbers

Dear support team

Spinner tool isn´t working with negative numbers :-(

The creasy situation is: In the eding fields of Form this function ist ok, in the formpreview or after download the error comes.

When i configure the "min value" to under zero, "-25" for example an activate the negative option, i can only switch at numbers over 26, i can´t switch to numbers under 25 and absolute no under 0 to -25.

(only in finish form, at preview or after download, in the editor its working!)

After my check, the "min value" is change to "false" :-((

I need any button/slider ...with the user can change an input from -25 to (+) 25. Can jotform pimp the slider to negatives values ( -25 ....... 0 ....... 25) ore repare the spinner?

Form in the editor: http://www.jotformeu.com/?formID=21050624816345 (working)

Finished (test-)form: http://form.jotformeu.com/form/21050624816345 (not working)

Thank you very much.

nordlicht_68 from germany, excuse my bad english