Bluetooth doesn't power on if it was turned off without disconnecting headset

[Surya Teja K]

lsb_release -rd:

Description: Ubuntu 18.04.4 LTS
Release: 18.04

apt-cache policy pkgname:

linux-image-5.3.0-51-generic:
  Installed: 5.3.0-51.44~18.04.2
  Candidate: 5.3.0-51.44~18.04.2
  Version table:
 *** 5.3.0-51.44~18.04.2 500
        500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu bionic-security/main amd64 Packages
        100 /var/lib/dpkg/status

Problem:

I use a bluetooth headset for listening to music and I have noticed an issue where if I use "Turn Off" option from the Bluetooth shortcut while it is connected to my Bluetooth headset, chances are, the next time I power on the laptop.

Steps to reproduce:

1. Have QCA9565/AR9565 WLAN+BT chip
2. Install Ubuntu 18.04 LTS
3. Connect Bluetooth to a bluetooth headset.
4. After few minutes, power down Bluetooth from gnome-control-center OR using "Turn Off" option in Bluetooth shortcut in top bar WITHOUT DISCONNECTING the headset.

Expected Behavior:
Bluetooth should work irrespective of how it was turned off.

Actual Behavior:
Need to restart my laptop to gain access to Bluetooth.

Note:

I upgraded bluez to version v5.50 from PPA according to this article:
https://medium.com/@overcode/fixing-bluetooth-in-ubuntu-pop-os-18-04-d4b8dbf7ddd6
but this didn't work

PPA used: ppa:bluetooth/bluez

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-5.3.0-51-generic 5.3.0-51.44~18.04.2
ProcVersionSignature: Ubuntu 5.3.0-51.44~18.04.2-generic 5.3.18
Uname: Linux 5.3.0-51-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.14
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri May 1 10:34:31 2020
InstallationDate: Installed on 2019-05-12 (354 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
SourcePackage: linux-signed-hwe
UpgradeStatus: No upgrade log present (probably fresh install)