Constant screen flickering in hexchat

[Ken Sharp]

Whenever I send text in Hexchat, the window goes insane. This is the only app on my computer that behaves this way. Video attached.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: hexchat 2.16.0-4build1
ProcVersionSignature: Ubuntu 6.5.0-15.15~22.04.1-generic 6.5.3
Uname: Linux 6.5.0-15-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: MATE
Date: Mon Feb 5 15:21:44 2024
SourcePackage: hexchat
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.apport.crashdb.conf: [modified]
mtime.conffile..etc.apport.crashdb.conf: 2019-08-06T11:56:22.315382