Bug#955804: upgrade-reports: Packages on testing are broken due to dependencies to libevent

Package: upgrade-reports
Severity: important

Dear Maintainer,

Many packages, including chromium, thunderbird, firefox-esr, are not able to
upgrade due to dependent on libevent-2.1-6 while Debian testing has upgraded
libevent to libevent-2.1-7.

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?

Debian testing has upgraded to libevent-2.1-7 but packages of chromium,
thunderbird, firefox-esr are still depending on libevent-2.1-6

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

Just apt update; apt upgrade
In my /etc/source.list I have testing repository and buster/update/main.
Newest version of the above packages were from buster/update/main.

   * What was the outcome of this action?

Unable to upgrade.

   * What outcome did you expect instead?

The above packages should be rebuilt depending on libevent-2.1-7



-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.4.0-4-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=zh_TW.UTF-8, LC_CTYPE=zh_TW.UTF-8 (charmap=UTF-8), LANGUAGE=zh_TW:zh (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled