brew bundle upgrade doesn't upgrade dependencies formulae and auto-update casks

[ppo]

Output of brew config

HOMEBREW_VERSION: 4.5.8
ORIGIN: https://github.com/Homebrew/brew
HEAD: c19f08b3e8ea46ba94bd9315c46c0dda10ead31c
Last commit: 10 days ago
Branch: stable
Core tap JSON: 03 Jul 12:19 UTC
Core cask tap JSON: 03 Jul 12:19 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 10
Homebrew Ruby: 3.4.4 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.4.4/bin/ruby
CPU: deca-core 64-bit arm_donan
Clang: 16.0.0 build 1600
Git: 2.50.0 => /opt/homebrew/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 15.5-arm64
CLT: 26.0
Xcode: 16.4
Rosetta 2: false

Output of brew doctor

(not relevant)

Description of issue

brew bundle upgrade doesn't upgrade dependencies formulae nor auto-update casks.

So currently, after that, I (have to) execute brew upgrade --formula and brew upgrade --cask --greedy-auto-updates.

Am I doing something wrong or missed something? Or is something that could/should be improved?

[Aethereal-Wraith]

This also affects me. I have noticed occasionally that installed-as-dependency formulae aren't upgraded when Brewfile dependencies are upgraded. Also, when calling brew bundle install --upgrade --file path/to/file, Brewfile dependencies marked as cask "caskname", greedy_auto_updates: true will not upgrade early like they are meant to, updating only when outdated shows < instead of !=.

I've been trying to learn a bit of Ruby so that I can contribute, but I'm an amateur so it's a bit overwhelming. If someone could point me in the right direction, I'd be happy to spend some time giving it my best shot.