Speedbooster significantly reduces your jump speed in lava and should be turned off.

Requires:

"Gravity"
"canDisableEquipment"
{
  "heatFrames": 350
}
{
  "lavaFrames": 100
}
{
  "spikeHits": 2
}
{
  "or": [
    "canUseIFrames",
    {
      "and": [
        {
          "spikeHits": 2
        },
        {
          "heatFrames": 50
        }
      ]
    },
    "canHorizontalDamageBoost"
  ]
}