ol.ext FontSymbol offset X & Y not working

[jeromeBor]

I'm trying to make an offset icon on my regular icon, like a status bullet on my style of my feature.

  this.iconStyle = [
      new ol.style.Style({
        image: new ol.style.FontSymbol({
          form: 'marker',
          radius: 25,
          fill: new ol.style.Fill({
            color: 'white'
          })
        }),
        text: new ol.style.Text({
          text: '\uF0D1',
          font: '900 22px "Font Awesome 5 Free"',
          offsetY: -2,
          fill: new ol.style.Fill({
            color: '#06305c'
          })
        })
      }),
     
      new ol.style.Style({
        image: new ol.style.FontSymbol({
          form: 'circle',
          radius: 10,
          offsetX: 17,
          offsetY: -20,
          fill: new ol.style.Fill({
            color: 'green'
          })
        }),
        text: new ol.style.Text({
          text: '30m',
          offsetY: -20,
          offsetX: 17,
          fill: new ol.style.Fill({
            color: 'white'
          })
        })
      })
    ]

Here is result of what my app show

As you can see, the text of openlayer Style is correctly displayed with the good offest, but the fontSymbol circle doesnt seems to get the offset I wrote.

Here is the API for fontSymbol of ol.ext : https://viglino.github.io/ol-ext/doc/doc-pages/ol.style.FontSymbol.html

What am I doing wrong ?

NB : https://viglino.github.io/ol-ext/examples/style/map.style.font.html the "offset" tickbox also seems not to work.

[Viglino]

It seems something has change in the and ol@v6 use a displacement.
The last commit should fix the bug.
Now FontSymbol offset use the displacement with ol>v6.