cinder volume multipath device detaching failed and mounted to /boot/efi incorrectly

Issue

When deleting nova instance, multipath flushing failed because of map in use:

2023-10-16 12:02:51.038 7 WARNING os_brick.exception [req-xxx - default default] Flushing 3600xxxxxx failed: oslo_concurrency.processutils.ProcessExecutionError: Unexpected error while running command.
2023-10-16 12:02:51.039 7 WARNING nova.virt.libvirt.driver [req-xxx - default default] [instance: AAAA] Ignoring Volume Error on vol BBBB during delete Unexpected error while running command.
Command: multipath -f 3600xxxxxx
Exit code: 1
Stdout: ''
Stderr: 'Oct 16 12:02:11 | 3600xxxxxxp2: map in use\n': oslo_concurrency.processutils.ProcessExecutionError: Unexpected error while running command.

And from output of command lsblk, multipath 3600xxxxxxp2 is mounted on /boot/efi incorrectly.

[root@dpdkcompute-4 ~]# lsblk
NAME                                    MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
sda                                       8:0    0 893.8G  0 disk
├─sda1                                    8:1    0     1M  0 part
├─sda2                                    8:2    0   100M  0 part
├─sda3                                    8:3    0 893.6G  0 part  /
└─sda4                                    8:4    0    64M  0 part
sdb                                      65:16   0    20G  0 disk
├─sdb1                                   65:17   0     1M  0 part
├─sdb2                                   65:18   0   100M  0 part
├─sdb3                                   65:19   0   9.9G  0 part
└─3600xxxxxx     253:4    0    20G  0 mpath
  ├─3600xxxxxxp1 253:5    0     1M  0 part
  ├─3600xxxxxxp2 253:6    0   100M  0 part  /boot/efi
  └─3600xxxxxxp3 253:7    0  19.9G  0 part
sdc                                      65:32   0    20G  0 disk
├─sdc1                                   65:33   0     1M  0 part
├─sdc2                                   65:34   0   100M  0 part
├─sdc3                                   65:35   0   9.9G  0 part
└─3600xxxxxx     253:4    0    20G  0 mpath
  ├─3600xxxxxxp1 253:5    0     1M  0 part
  ├─3600xxxxxxp2 253:6    0   100M  0 part  /boot/efi
  └─3600xxxxxxp3 253:7    0  19.9G  0 part
sdd                                      65:48   0    20G  0 disk
├─sdd1                                   65:49   0     1M  0 part
├─sdd2                                   65:50   0   100M  0 part
├─sdd3                                   65:51   0   9.9G  0 part
└─3600xxxxxx     253:4    0    20G  0 mpath
  ├─3600xxxxxxp1 253:5    0     1M  0 part
  ├─3600xxxxxxp2 253:6    0   100M  0 part  /boot/efi
  └─3600xxxxxxp3 253:7    0  19.9G  0 part
sde                                      65:64   0    20G  0 disk
├─sde1                                   65:65   0     1M  0 part
├─sde2                                   65:66   0   100M  0 part
├─sde3                                   65:67   0   9.9G  0 part
└─3600xxxxxx     253:4    0    20G  0 mpath
  ├─3600xxxxxxp1 253:5    0     1M  0 part
  ├─3600xxxxxxp2 253:6    0   100M  0 part  /boot/efi
  └─3600xxxxxxp3 253:7    0  19.9G  0 part