Keyboard stops working randomly [Deletes typed text automatically]

I have been using ubuntu 18.04 on my Lenovo ThinkPad L450 since a while now, but from last week I am facing one issue with the keyboard. While typing, randomly typed text get deleted [something like delete key is getting pressed automatically].

So, I tried connecting external [USB] keyboard [Amazon Basics] which I have been using since long with same laptop with ubuntu, but the same problem with USB keyboard as well.

So, I thought something may be wrong with my laptop hardware, so I tried playing with the keyboard on windows 10 [I have dual boot laptop], surprisingly everything works fine on windows, laptop keyboard as well as external USB keyboard both worked fine. Not a single time I faced the problem that I am facing with ubuntu.

So, I think after some packages updates something weird happening with my keyboards.

Machine Details:
OS: ubuntu 18.04.3 LTS
Model: Lenovo Thinkpad L450
GNOME: 3.28.2

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.34
ProcVersionSignature: Ubuntu 4.15.0-66.75-generic 4.15.18
Uname: Linux 4.15.0-66-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 25 08:17:58 2019
InstallationDate: Installed on 2018-10-22 (367 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: No upgrade log present (probably fresh install)
VarLogDistupgradeAptlog:
 Log time: 2019-08-04 10:20:53.328537
 Starting pkgProblemResolver with broken count: 0
 Starting 2 pkgProblemResolver with broken count: 0
 Done