APEX service running on Oracle Cloud "always free" experiencing "stopping" after minutes

oracle cloud apex service in "always free" account stops after minutes running showing up errors "Service not available 503", or "500 internal server error".

Then going to console and shows up "Stopping". After "stopped" you can "Startup" to get a few minutes running.

Is it a predefined behavior when your account end "trial period" and you still has a database instance not "allways free"?

After "terminating" initial database, that not "always free", it remains in console.