Normally when I go to a game page it lists all the bundles I own it in, such as this:

Very useful!

But I noticed some don't do this. For example, I have the Bundle for Ukraine which includes these:

But when I go to the game page from there, it doesn't mention Bundle for Ukraine at all:

So there may be issues with how some bundles are set up, or items within it? A bug somewhere?

Here are some of those I spotted:

Items from the Bundle for Ukraine that don't show up as being in that bundle on the game's page:

https://draknek.itch.io/sokobond

https://noio.itch.io/cloud-gardens

https://brokenrules.itch.io/and-yet-it-moves

Items from the Indie bundle for Palestinian Aid that don't show up as being in that bundle on the game's page:

https://fellowtraveller.itch.io/hacknet

https://axoninteractive.itch.io/quench

https://jannikboysen.itch.io/shutterstroll

https://puppetcombo.itch.io/babysitter-bloodbath

https://moshelinke.itch.io/fugue-in-void

https://adriaan.itch.io/hidden-folks

https://cheeseness.itch.io/hive-time

https://vltmn.itch.io/lieve-oma

https://owenthebell.itch.io/mendel

https://brokenrules.itch.io/old-mans-journey

https://overfull.itch.io/plantdaddy

https://linker.itch.io/polymute

https://axoninteractive.itch.io/quench

https://distantlantern.itch.io/quietasastone

https://beyondthosehills.itch.io/reky

https://brokenrules.itch.io/secrets-of-raetikon

https://tinyredcamel.itch.io/shrug-island-the-meeting

https://jannikboysen.itch.io/shutterstroll

https://echodog-games.itch.io/signs-of-the-sojourner

https://sparsegamedev.itch.io/spring-falls

https://ycjy.itch.io/aquaticadventure

https://danielmullinsgames.itch.io/the-hex

https://fellowtraveller.itch.io/the-stillness-of-the-wind

https://pintroverts.itch.io/thing-in-itself

https://docgeraud.itch.io/un-pas-fragile

https://turnfollow.itch.io/wide-ocean-big-jacket

Even if it can't be fixed, it is worth being aware of if you own bundles, as it could lead you to double-buying something you already own in a bundle.