Hello and welcome to the forum :)
To answer your question, we´d have to know which application you are talking about. Some general notes:
- When you log out of r3, the current "navigation" (eg. which form / record was last visited) is still in the URL. So when you re-login (or somebody else logs in) r3 would attempt to show the same content. This is the case in the current version of r3, but you can argue whether this is a good idea in all situations.
- If the current user has no access permissions to the record, it would be greeted with an error after login and they would need to navigate to someplace else to continue.
- However, not all applications limit access to all records. In REI3 Tasks, for example, many tasks are accessible to all users, because there are about a dozen ways to share/delegate them - so the relation policy is only really blocking access to tasks labeled as
private. Other apps have more or less strict access policies, depending on what makes sense, as restricting access usually comes at the price of convenience and/or performance.
What application are you talking about? Is it one from the store or maybe a self-built one?