When MindSpore derives and passes in the sens value, infer reports an error For 'MatMul', the input dimensions

1 Error description

1.1 System environment

Hardware Environment(Ascend/GPU/CPU): GPU Software Environment:

• MindSpore version (source or binary): 1.7.0
• Python version (e.g., Python 3.7.5): 3.7.5
• OS platform and distribution (e.g., Linux Ubuntu 16.04): Ubuntu 18.04.4 LTS
• GCC/Compiler version (if compiled from source): 7.5.0

1.2 Basic information

1.2.1 Source code

import numpy as np
import mindspore.nn as nn
import mindspore.ops as ops
from mindspore import Tensor
from mindspore import ParameterTuple, Parameter
from mindspore import dtype as mstype

x = Tensor([[0.8, 0.6, 0.2], [1.8, 1.3, 1.1]], dtype=mstype.float32)
y = Tensor([[0.11, 3.3, 1.1], [1.1, 0.2, 1.4], [1.1, 2.2, 0.3]], dtype=mstype.float32)

class Net(nn.Cell):
    def __init__(self):
        super(Net, self).__init__()
        self.matmul = ops.MatMul()
        self.z = Parameter(Tensor(np.array([1.0], np.float32)), name='z')

    def cons