suggestions for Instance count and worker processes

I have an app that load information from a database.

We noticed that if there's a change in the database in few hours before someone starts working in the app, then some users won't see the new information. (if I open a new tab or press shift F5 then it starts noticing the new info, that's why I thought of the instance factor)

I believe it's because if there's an instance working, this is not up to date with the info.

I have a max worker process of 3 and 5 instance count.

I believe that if I set those to 2, then the problem will disappear or at least improve.

Any recommendations? Am I getting wrong the instance count setting?

Thank you all.