gzipped source files interfering with 'force'=false when copying

[Remi-Gau]

is option 'force'=false is ignored when using copy_to_derivative?

Or are gzipped source files interfering with 'force'=false?

filter = struct('suffix', 'bold', ...
    'task', 'VisStim', ...
    'space', 'MNI152NLin2009cAsym', ...
    'desc', 'preproc');
bids.copy_to_derivative(bidsroot_prep, ...
    'pipeline_name', 'SPM12', ...
    'out_path', bidsroot_deriv, ...
    'filter', filter, 'unzip', true, ...
    'force', false, 'tolerant', true, ...
    'use_schema', false);

Executing the above copy_to_derivative statement twice leads to updated time stamps, that is why I think files are copied regardless if they already exist.