Chunksize after saving not as expected

Hi,
I have saved a cube (gdal vrt) into zarr format using:

YAXArray with the following dimensions                                                                                                                                            
Y                   Axis with 20031 Elements from 8.999672143000053 to 10.798997657091446                                                                                            
X                   Axis with 11121 Elements from 56.84381181516477 to 55.84488521922387                                                                                             
Time             Axis with 243 Elements from 2020-01-03T00:00:00 to 2020-12-31T00:00:00                                                                                           
name: layer                                                                                                                                                                  
Total size: 201.66 GB

let
    cubepath=joinpath(path_out, "$(start_date)_$(end_date).zarr")
    if !isdir(cubepath)
	    savecube(cube, cubepath, chunksize=Dict("Time"=>1, "X"=>256, "Y"=>256))
    end
end

When I load the cube again and check the chunk size it has a different chunk size:

julia> YAXArrays.Cubes.cubechunks(cube)
(20031, 512, 1)

Start by reproducing the savecube call with chunksize set for Time, X, and Y, then reload the Zarr cube and inspect it with cubechunks(cube). Compare the requested chunk sizes with the returned tuple; done means the reloaded cube reports the configured chunking or clearly documents the conversion.