Raycast未命中鼠标正确位置问题求助

我觉得这是个简单问题，但需要帮忙排查——我的SelectionManager触发UI元素显示的事件，只有鼠标放在略微偏移的位置时才生效。

图片说明：蓝色的Rock5是要触发UI的目标对象，但实际UI在Rock6处显示；另一张图展示了需要把鼠标放在哪里才能激活UI，蓝色为目标对象

已尝试但无效的修复方法 #

• 调整鼠标灵敏度
• 将碰撞体从Mesh改为Box，无效果
• 修改RayCast距离，无变化

SelectionManager代码 #

public GameObject interaction_Info_UI;
public GameObject interaction_item_origin;
public GameObject interaction_item_classification;
public GameObject interaction_item_description;
public GameObject interaction_item_closerlook;
public GameObject interaction_item_minerals;
public float distanceToHit = 5000;
Text interaction_text_name;
Text interaction_text_origin;

private void Start()
{
    interaction_text_name = interaction_Info_UI.GetComponent<Text>();
    interaction_text_origin = interaction_item_origin.GetComponent<Text>();
}

void Update()
{
    Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
    RaycastHit hit;
    if (Physics.Raycast(ray, out hit))
    {
        var selectionTransform = hit.transform;

        if (selectionTransform.GetComponent<InteractableObject>())
        {
            interaction_text_name.text = selectionTransform.GetComponent<InteractableObject>().GetItemName();
            interaction_Info_UI.SetActive(true);
            interaction_text_origin.text = selectionTransform.GetComponent<InteractableObject>().GetItemOrigin();
            interaction_item_origin.SetActive(true);
        }
        else 
        { 
            interaction_Info_UI.SetActive(false);
            interaction_item_origin.SetActive(false);
        }

    }
}

内容的提问来源于stack exchange，提问作者Anna