RStudio pauses run of R pipeline, when tab with RStudio server is closed (session is active)

We have RStudio within our solution (with Workspace, TaskBroker so on) on multiple virtual machines (AWS).
All worked fine, but about a month ago we faced new deviation in behaviour:

RStudio pauses run of R pipeline when tab with RStudio server is closed (session is active) and continues run from the stop point, when page with IDE is reopened.

Session is not affecting this - it's active
Have someone experienced such flow?
Maybe any ideas where to look at?