I think you should rebase your commit onto 4.4 and target that branch too. Currently your PR contains changes from 5.4 and targets 5.3 which is incorrect.

git checkout 4.4
git cherry-pick 8bc6ed9
git push origin 4.4:patch-1 -f 

I think you should rebase your commit onto 4.4 and target that branch too. Currently your PR contains changes from 5.4 and targets 5.3 which is incorrect.

git checkout 4.4
git cherry-pick 8bc6ed9
git push origin 4.4:patch-1 -f 

Thanks.
Since symfony/runtime is a 5.3 new component I thought 5.3 was the right target branch.

Sorry, you're right, should be 5.3!

Thanks Andrea! This is now merged.