tick option with "every" specified does not change the tick placement

In the code block below I define tick and every.

{signal: [
    {name: 'clk',   wave: 'l.h.l.h.l.h.l.h.l.h.l.h.l..'}
],
 head: { text: 'Test',
         tick:0,
         every:2
       },
 foot: { text: "Test2",
         tick: 0,
         every: 4
       }
}

If I use the online wavedrom editor it works as expected:

wavedrom

When using wavedrom-cli I instead get the image below:

test

I am using version 2.8.1 of wavedrom-cli.

wavedrom / cli

tick option with "every" specified does not change the tick placement #21