Tested on Octopus 4.1.10
Step to reproduce:
Define a parameter in a step template with control type Checkbox and default value of False

When adding to a project, the parameter displays as True.

Expanding the field shows the checkbox correctly not selected.

On deployment, parameter is evaluated correctly, so it's a UI bug.
Source: https://help.octopusdeploy.com/discussions/problems/68100-step-template-check-box-parameters-are-always-evaluated-as-true-even-though-the-parameters-are-set-to-false
Tested on Octopus 4.1.10
Step to reproduce:
Define a parameter in a step template with control type
Checkboxand default value ofFalseWhen adding to a project, the parameter displays as
True.Expanding the field shows the checkbox correctly not selected.
On deployment, parameter is evaluated correctly, so it's a UI bug.
Source: https://help.octopusdeploy.com/discussions/problems/68100-step-template-check-box-parameters-are-always-evaluated-as-true-even-though-the-parameters-are-set-to-false