Stuck in stopping state

Hello there, I have launched EC2 instance with hibernate mode enabled from custom Ubuntu-20 based AMI. When I choose hibernate option for this EC2 instance, its taking more than 20 minutes to change from stopping to stopped state. I don't know why its taking this much time to take stopped state. I tried with multiple EC2 instances from this custom AMI. All launched instances from this AMI, taking more than 20 minutes to stopped state. I increased my root volume size too, now this root volume has more than 15 GB free space. However, its still taking more time to stopped state when I choose hibernate option from console. I can see the hibernate related logs from /var/log/syslog. Can any one please help me to outdo from this issues?

Sep 27 12:17:41 SparxEA systemd[1]: Starting EC2 instance hibernation setup agent... Sep 27 12:17:41 SparxEA /hibinit-agent: Effective config: {'log_to_syslog': True, 'log_to_stderr': True, 'mkswap': 'mkswap {swapfile}', 'swapon': 'swapon {swapfile}', 'swapoff': 'swapoff {swapfile}', 'touch_swap': False, 'grub_update': True, 'swap_percentage': 100, 'swap_mb': 4000} Sep 27 12:17:41 SparxEA /hibinit-agent: Will check if swap is at least: 4000 megabytes Sep 27 12:17:41 SparxEA /hibinit-agent: Create swap and initialize it Sep 27 12:17:41 SparxEA hibinit-agent[1101]: Effective config: {'log_to_syslog': True, 'log_to_stderr': True, 'mkswap': 'mkswap {swapfile}', 'swapon': 'swapon {swapfile}', 'swapoff': 'swapoff {swapfile}', 'touch_swap': False, 'grub_update': True, 'swap_percentage': 100, 'swap_mb': 4000} Sep 27 12:17:41 SparxEA hibinit-agent[1101]: Will check if swap is at least: 4000 megabytes Sep 27 12:17:41 SparxEA hibinit-agent[1101]: Create swap and initialize it Sep 27 12:17:41 SparxEA /hibinit-agent: kicking child process to initiate the setup Sep 27 12:17:41 SparxEA /hibinit-agent: Allocating 4194304000 bytes in /swap-hibinit Sep 27 12:17:41 SparxEA /hibinit-agent: Swap pre-heating is skipped, the swap blocks won't be touched during to ensure they are ready Sep 27 12:17:41 SparxEA /hibinit-agent: Running: mkswap /swap-hibinit Sep 27 12:17:41 SparxEA systemd[1]: Started EC2 instance hibernation setup agent. Sep 27 12:17:41 SparxEA hibinit-agent[1105]: Setting up swapspace version 1, size = 3.9 GiB (4194299904 bytes) Sep 27 12:17:41 SparxEA hibinit-agent[1105]: no label, UUID=16350ccb-d242-40f1-93f5-9fbe280d33ce Sep 27 12:17:41 SparxEA /hibinit-agent: Running: swapon /swap-hibinit Sep 27 12:17:41 SparxEA kernel: [ 25.160330] Adding 4095996k swap on /swap-hibinit. Priority:-2 extents:16 across:11141120k SSFS Sep 27 12:17:41 SparxEA /hibinit-agent: Updating the kernel offset for the swapfile: /swap-hibinit Sep 27 12:17:41 SparxEA /hibinit-agent: Updating GRUB to use the device PARTUUID=4986e35b-1bd5-45d3-b528-fa2edb861a38 with offset 4161536 for resume Sep 27 12:17:42 SparxEA hibinit-agent[1112]: Sourcing file /etc/default/grub' Sep 27 12:17:42 SparxEA hibinit-agent[1112]: Sourcing file /etc/default/grub.d/40-force-partuuid.cfg' Sep 27 12:17:42 SparxEA hibinit-agent[1112]: Sourcing file /etc/default/grub.d/50-cloudimg-settings.cfg' Sep 27 12:17:42 SparxEA hibinit-agent[1112]: Sourcing file /etc/default/grub.d/99-set-swap.cfg' Sep 27 12:17:42 SparxEA hibinit-agent[1112]: Sourcing file `/etc/default/grub.d/init-select.cfg' Sep 27 12:17:42 SparxEA hibinit-agent[1187]: Generating grub configuration file ... Sep 27 12:17:42 SparxEA hibinit-agent[1245]: GRUB_FORCE_PARTUUID is set, will attempt initrdless boot Sep 27 12:17:42 SparxEA hibinit-agent[1245]: Found linux image: /boot/vmlinuz-5.15.0-1019-aws Sep 27 12:17:42 SparxEA hibinit-agent[1245]: Found initrd image: /boot/microcode.cpio /boot/initrd.img-5.15.0-1019-aws Sep 27 12:17:43 SparxEA hibinit-agent[1245]: Found linux image: /boot/vmlinuz-5.13.0-1029-aws Sep 27 12:17:43 SparxEA hibinit-agent[1245]: Found initrd image: /boot/microcode.cpio /boot/initrd.img-5.13.0-1029-aws Sep 27 12:17:43 SparxEA hibinit-agent[1740]: Found memtest86+ image: /boot/memtest86+.elf Sep 27 12:17:43 SparxEA hibinit-agent[1740]: Found memtest86+ image: /boot/memtest86+.bin Sep 27 12:17:45 SparxEA hibinit-agent[1823]: Found Ubuntu 20.04.5 LTS (20.04) on /dev/nvme0n1p1 Sep 27 12:17:46 SparxEA hibinit-agent[3078]: done Sep 27 12:17:46 SparxEA /hibinit-agent: GRUB configuration is updated Sep 27 12:17:46 SparxEA /hibinit-agent: Setting swap device to 66305 with offset 4161536 Sep 27 12:17:46 SparxEA /hibinit-agent: Done updating the swap offset. Turning swapoff Sep 27 12:17:46 SparxEA /hibinit-agent: Running: swapoff /swap-hibinit Sep 27 12:17:46 SparxEA systemd[1]: swap\x2dhibinit.swap: Succeeded. Sep 27 12:17:46 SparxEA systemd[877]: swap\x2dhibinit.swap: Succeeded. Sep 27 12:17:46 SparxEA hibinit-agent[1103]: Effective config: {'log_to_syslog': True, 'log_to_stderr': True, 'mkswap': 'mkswap {swapfile}', 'swapon': 'swapon {swapfile}', 'swapoff': 'swapoff {swapfile}', 'touch_swap': False, 'grub_update': True, 'swap_percentage': 100, 'swap_mb': 4000} Sep 27 12:17:46 SparxEA hibinit-agent[1103]: Will check if swap is at least: 4000 megabytes Sep 27 12:17:46 SparxEA hibinit-agent[1103]: Create swap and initialize it Sep 27 12:17:46 SparxEA hibinit-agent[1103]: kicking child process to initiate the setup Sep 27 12:17:46 SparxEA hibinit-agent[1103]: Allocating 4194304000 bytes in /swap-hibinit Sep 27 12:17:46 SparxEA hibinit-agent[1103]: Swap pre-heating is skipped, the swap blocks won't be touched during to ensure they are ready Sep 27 12:17:46 SparxEA hibinit-agent[1103]: Running: mkswap /swap-hibinit Sep 27 12:17:46 SparxEA hibinit-agent[1103]: Running: swapon /swap-hibinit Sep 27 12:17:46 SparxEA hibinit-agent[1103]: Updating the kernel offset for the swapfile: /swap-hibinit Sep 27 12:17:46 SparxEA hibinit-agent[1103]: Updating GRUB to use the device PARTUUID=4986e35b-1bd5-45d3-b528-fa2edb861a38 with offset 4161536 for resume Sep 27 12:17:46 SparxEA hibinit-agent[1103]: GRUB configuration is updated Sep 27 12:17:46 SparxEA hibinit-agent[1103]: Setting swap device to 66305 with offset 4161536 Sep 27 12:17:46 SparxEA hibinit-agent[1103]: Done updating the swap offset. Turning swapoff Sep 27 12:17:46 SparxEA hibinit-agent[1103]: Running: swapoff /swap-hibinit Sep 27 12:17:46 SparxEA systemd[1]: hibinit-agent.service: Succeeded.