[MCPE-48129] "minecraft:boostable" component not working correctly

the "speed_multiplier" parameter of the "minecraft:boostable" entity component cannot be changed or is overwritten by the game somehow.

So this

        "minecraft:boostable": {
          "speed_multiplier": 2.0,
          "duration": 3.0,
          "boost_items": [
            {
              "item": "carrotOnAStick",
              "item_damage": 2,
              "replaceItem": "fishing_rod"
            }
          ]
        },

will work the same if i write

          "speed_multiplier": 10.0,