Remote Execution SSH-based Power Action remains pending after successful reboot of the host

Issue

• After issuing a host reboot job through SSH-based REX, the job may remain in Pending state on Satellite. The host reboots just fine as expected but even after 18+ hours the task still shows Pending.
• The "Power Action - SSH Default" is used to restart all the VMs within a hostcollection. The job works, all the VMs were rebooted but the job is stucked at 50 %.