Redmine

Hi all

My environnement

Environment:
Redmine version 4.2.6.stable
Ruby version 2.7.6-p219 (2022-04-12) [x86_64-linux]
Rails version 5.2.8
Environment production
Database adapter PostgreSQL
Mailer queue ActiveJob::QueueAdapters::AsyncAdapter
Mailer delivery smtp
SCM:
Subversion 1.10.2
Git 2.31.1
Filesystem
GitRemote 2.31.1
Redmine plugins:
redmine_agile 1.6.4
redmine_banner 0.3.4
redmine_checklists 3.1.21
redmine_git_remote 0.0.2
redmine_issue_templates 1.1.0
redmine_passerelle_cap2 1.1.0
redmine_webhook 1.0.1
view_customize 3.4.0

On one of my projects, I have 2630 members
When a user add a fliter based onAssigned_to_id in a custom report, it takes between 30 and 60 seconds to load the field.
It happens on Firefox and it is a little more fast on IE but still too slow.

Is it related to my redmine version or the root cause can be eslewhere ?
I check on database, everything is good, no overlay.
It seems the navigator has difficulties to absorp the amount of data.
It was not the same on version 3.3 we had before.