Interactive SVG background: text state is not displayed

Before we do a private remote session to debug it on your side, I put together a simple example that works which only contains a text:

Here is the svg (click on it and “save as…”):

and here is how I defined the text (note that the item is linked to the tspan element, not the text element)

 <text
       xml:space="preserve"
       style="font-style:normal;font-weight:normal;font-size:10.5833px;line-height:1.25;font-family:sans-serif;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583"
       x="8.426899"
       y="36.443012"
       id="text1"><tspan
         sodipodi:role="line"
         id="textContent"
         style="stroke-width:0.264583"
         x="8.426899"
         y="36.443012"
         flash="true"
         openhab="true">MyText</tspan></text>

Here is the definition of the canvas (paste it into the code tab):

config:
  embedSvg: true
  embedSvgFlashing: true
  embeddedSvgActions:
    textContent:
      action: toggle
      actionCommand: ON
      actionCommandAlt: OFF
      stateItems:
        - slider1
  fixedType: canvas
  grid: 10
  hideNavbar: true
  imageUrl: /static/text.svg
  label: circle_floor
  layoutType: fixed
  screenHeight: 1080
  screenWidth: 1920
  sidebar: false
  visibleTo:
    - role:administrator
blocks: []
masonry: []
grid: []
canvas:
  - component: oh-canvas-layer
    config:
      preload: true
    slots:
      default: []

Define the item 'slider1" as follows:

label: Slider 1
type: Dimmer
category: light
groupNames:
  - verschiedenes
tags:
  - Point

Result (item set to 77 and canvas displaying 77):