Load updates progress bars list does not fill all available space

[Mingun]

See the screenshot

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: update-manager 1:20.04.10.9
ProcVersionSignature: Ubuntu 5.4.0-87.98-generic 5.4.140
Uname: Linux 5.4.0-87-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu Sep 30 09:07:57 2021
InstallationDate: Installed on 2020-11-24 (309 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: No upgrade log present (probably fresh install)

[Julian Andres Klode (juliank)]

It's unclear to me what you are requesting here. Only 4 updates have been downloaded so far, so the window at this size will have some empty space, which is to be expected.

[Launchpad Janitor (janitor)]

[Expired for update-manager (Ubuntu) because there has been no activity for 60 days.]

[Mingun (alexander-sergey)]

It has the same height for any number of updates. Do not matter how many bars in here -- the list should occupies all available space. For what reason this unused space is here?