Help with roll and dive edge case

[dire summit]

local function doDive()
    DivePermission = DivePermissionEvent:InvokeServer(Humanoid)
    if not DivePermission then return end

    if Humanoid:GetState() == Enum.HumanoidStateType.Freefall then
        Humanoid:ChangeState(Enum.HumanoidStateType.Flying)

        emitRollEffects(true)

        Root.Velocity = Root.CFrame:VectorToWorldSpace(
            Vector3.new(0, Humanoid.JumpPower * DIVE_POWER, -Humanoid.WalkSpeed * DIVE_LENGTH)
        )
        Root.RotVelocity = Root.CFrame:VectorToWorldSpace(
            Vector3.new(-math.rad(DIVE_ROT), 0, 0)
        )

        Humanoid:SetStateEnabled(Enum.HumanoidStateType.Jumping, false)

        Humanoid:GetPropertyChangedSignal("FloorMaterial"):Once(function()
            if Humanoid.FloorMaterial ~= Enum.Material.Air then
                rollAnim:Play()
                task.wait(rollAnim.Length)
                Humanoid:SetStateEnabled(Enum.HumanoidStateType.Jumping, true)
            end
        end)
    else
        Root.Velocity = Root.CFrame:VectorToWorldSpace(
            Vector3.new(0, 0, -Humanoid.WalkSpeed * DIVE_LENGTH * 2)
        )

        rollAnim:Play()
        emitRollEffects()
    end
end```

Above is the code snippet.
When the dive or roll is "activated", the player's jump  state is disabled, and then enabled again when touching the ground (which is checked by the floormaterialchanged event).

But, very rarely, the event doesn't work properly, making the player not be able to jump permanently.

How do i fix this?

[limpid acorn]

use raycasts facing down

overall better and should fix the inconsistency

[sullen copper]

I would do a sphere cast for if the players on an edge or something

[dire summit]

I tried this myself,

local raycastParams = RaycastParams.new()
            raycastParams.FilterType = Enum.RaycastFilterType.Exclude
            raycastParams.FilterDescendantsInstances = {Character:GetDescendants()}

            local direction = -Root.CFrame.UpVector * 5
            local origin = Root.Position

            local raycastResults = workspace:Raycast(origin, direction, raycastParams)
            visualizeRaycast(origin, direction)

            if raycastResults then
                print(raycastResults.Instance)
                rollAnim:Play()
                task.wait(rollAnim.Length)
                Humanoid:SetStateEnabled(Enum.HumanoidStateType.Jumping, true)
            end

Works fine right now for normal surfaces, but how about walls and/or slopes?
(haven't used sphere casts yet bc only for tests)