Shortcharging and stopping between the crumbles should allow for 3 attemps before the room needs to be reset or a shorter shortcharge is the only option.

Requires:

"h_heatProof"
{
  "obstaclesNotCleared": [
    "A"
  ]
}
{
  "canShineCharge": {
    "usedTiles": 17,
    "openEnd": 1
  }
}
{
  "or": [
    {
      "and": [
        "canComplexCarryFlashSuit",
        "can4HighMidAirMorph"
      ]
    },
    "canWallJumpInstantMorph"
  ]
}
{
  "spikeHits": 1
}
"h_spikeSuitSpikeHitLeniency"
"canSpikeSuit"
{
  "shinespark": {
    "frames": 1,
    "excessFrames": 1
  }
}

Clears obstacles: A

Dev note: FIXME: This may not be possible if the lava is rising (with Speed Booster and the flag not yet set).