Thanks for replying, lakshya_27, and that additional info, it really helps! Next, see if this is related to the Back Tap feature of your iPhone, and here is more info:
Use Back Tap on your iPhone
Next, use your Mac or PC to backup and restore your iOS software to factory settings, as this process erases the information and settings on your device and installs a fresh copy of the latest iOS software. Temporarily set up your phone as new to test your issues, and then restore your back up and test the issues again.
How to back up your iPhone, iPad, and iPod touch
Transfer photos and videos from your iPhone, iPad, or iPod touch
Restore your iPhone, iPad or iPod touch to factory settings
Restore your iPhone, iPad, or iPod touch from a backup
Have a great day and thanks for using the Apple Support Communities!