VictoryGroup and VictoryAxis tickFormat

[jonathanj]

If I define a VictoryGroup then the tickFormat function is called with what look like indices, instead of the data from that group. If I unwrap only VictoryLine from VictoryGroup (and change nothing else) then tickFormat for the independent axis is called with the my_y data for each data point, as expected. If I pass data, x, and y to both VictoryLine and VictoryScatter then it also works.

What I would prefer is if I only needed to pass the data to VictoryGroup and tickFormat was called with the correct tick data. Is this possible and I'm doing something incorrectly?
 

<VictoryChart>
  <VictoryAxis tickFormat={(tick, index, data) => {
    console.log('tickFormat', {tick, index, data});
    return tick;
  }} />
  <VictoryGroup
    data={data}
    x='my_x'
    y='my_y'
  >
    <VictoryLine />
    <VictoryScatter size={4} />
  </VictoryGroup>
</VictoryChart>

And the incorrect output looks like this:

 LOG  tickFormat {"data": [1, 2, 3, 4, 5, 6], "index": 0, "tick": 1}
 LOG  tickFormat {"data": [1, 2, 3, 4, 5, 6], "index": 1, "tick": 2}
 LOG  tickFormat {"data": [1, 2, 3, 4, 5, 6], "index": 2, "tick": 3}
 LOG  tickFormat {"data": [1, 2, 3, 4, 5, 6], "index": 3, "tick": 4}
 LOG  tickFormat {"data": [1, 2, 3, 4, 5, 6], "index": 4, "tick": 5}
 LOG  tickFormat {"data": [1, 2, 3, 4, 5, 6], "index": 5, "tick": 6}

When I remove VictoryGroup (and VictorScatter), and pass data, x and y directly to VictoryLine, the output looks like this instead:

 LOG  tickFormat {"data": ["2023-09-04T00:00:00.000+02:00", "2023-09-05T00:00:00.000+02:00", "2023-09-06T00:00:00.000+02:00", "2023-09-07T00:00:00.000+02:00", "2023-09-08T00:00:00.000+02:00", "2023-09-09T00:00:00.000+02:00", "2023-09-10T00:00:00.000+02:00"], "index": 0, "tick": "2023-09-04T00:00:00.000+02:00"}
 LOG  tickFormat {"data": ["2023-09-04T00:00:00.000+02:00", "2023-09-05T00:00:00.000+02:00", "2023-09-06T00:00:00.000+02:00", "2023-09-07T00:00:00.000+02:00", "2023-09-08T00:00:00.000+02:00", "2023-09-09T00:00:00.000+02:00", "2023-09-10T00:00:00.000+02:00"], "index": 1, "tick": "2023-09-05T00:00:00.000+02:00"}
 LOG  tickFormat {"data": ["2023-09-04T00:00:00.000+02:00", "2023-09-05T00:00:00.000+02:00", "2023-09-06T00:00:00.000+02:00", "2023-09-07T00:00:00.000+02:00", "2023-09-08T00:00:00.000+02:00", "2023-09-09T00:00:00.000+02:00", "2023-09-10T00:00:00.000+02:00"], "index": 2, "tick": "2023-09-06T00:00:00.000+02:00"}
 LOG  tickFormat {"data": ["2023-09-04T00:00:00.000+02:00", "2023-09-05T00:00:00.000+02:00", "2023-09-06T00:00:00.000+02:00", "2023-09-07T00:00:00.000+02:00", "2023-09-08T00:00:00.000+02:00", "2023-09-09T00:00:00.000+02:00", "2023-09-10T00:00:00.000+02:00"], "index": 3, "tick": "2023-09-07T00:00:00.000+02:00"}
 LOG  tickFormat {"data": ["2023-09-04T00:00:00.000+02:00", "2023-09-05T00:00:00.000+02:00", "2023-09-06T00:00:00.000+02:00", "2023-09-07T00:00:00.000+02:00", "2023-09-08T00:00:00.000+02:00", "2023-09-09T00:00:00.000+02:00", "2023-09-10T00:00:00.000+02:00"], "index": 4, "tick": "2023-09-08T00:00:00.000+02:00"}
 LOG  tickFormat {"data": ["2023-09-04T00:00:00.000+02:00", "2023-09-05T00:00:00.000+02:00", "2023-09-06T00:00:00.000+02:00", "2023-09-07T00:00:00.000+02:00", "2023-09-08T00:00:00.000+02:00", "2023-09-09T00:00:00.000+02:00", "2023-09-10T00:00:00.000+02:00"], "index": 5, "tick": "2023-09-09T00:00:00.000+02:00"}
 LOG  tickFormat {"data": ["2023-09-04T00:00:00.000+02:00", "2023-09-05T00:00:00.000+02:00", "2023-09-06T00:00:00.000+02:00", "2023-09-07T00:00:00.000+02:00", "2023-09-08T00:00:00.000+02:00", "2023-09-09T00:00:00.000+02:00", "2023-09-10T00:00:00.000+02:00"], "index": 6, "tick": "2023-09-10T00:00:00.000+02:00"}