Disclaimer: I can't select 3.3.4 in version when creating this issue. Please move it to the right place if able.
When pushing new local branches to remote using the Push button, I have to multiclick on a checkbox or else I have an error:
The Remote branch '' (Local branch = 'mybranch') is invalid. Ref names must follow git ref-format rules: https://www.kernel.org/pub/software/scm/git/docs/git-check-ref-format.html Completed with errors, see above.
Version: SourceTree 3.3.4 [28 October 2019] (Help > Release Notes)
See: demo (GIF)