System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 511.09

Blender Version
Broken: version: 3.1.0 Alpha, branch: master, commit date: 2022-01-12 19:46, hash: rB97c2c3991620
Worked: (newest version of Blender that worked as expected)

Short description of error
[Please fill out a short description of the error here]

If the object has the 'MULTIRES' modifier and the modifier is on then the object.ray_cast of the object will fail, I don't know why this is,
如果物体有 'MULTIRES' 修改器，并且修改器是开启的那么物体的object.ray_cast将失效，我不知道为什么会这样

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]

I'm having a problem writing a function that tests if the mouse is over a model