Bug report #16018
Processing: numeric field are discarded and replaced with zero
|Affected QGIS version:||master||Regression?:||Yes|
|Operating System:||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:||fixed/implemented|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||23933|
The only way is to enter something is to click on "..." button, enter desired value in the expression dialog and close it by pressing OK.
Seems this is a general Processing bug and if I'm not wrong it worked fine before parameters refactoring.
#2 Updated by Arnaud Morvan about 3 years ago
This comes from QgsDoubleSpinBox and QgsSpinBox, easy to reproduce : change the rotation of the canvas by typing into the lineedit, put the focus outside and the change disapear.
It seems that this appends on ubuntu 16.04 with Qt 5.5.1 but not on ubuntu 16.10 with Qt 5.6.1.