Yes, it is actually possible that driver due to some reason did not free up memory.. if that happens the you will see these kind of failures:

• Unresponsiveness: The driver may become unresponsive, leading to failed health checks and potential restarts or kills by watchdog mechanisms.
• Frequent Restarts: Continuous memory pressure and GC overhead can cause the driver to restart frequently, leading to interruptions in job executions and degraded performance.
• Out of Memory (OOM) Conditions: Eventually, the driver might run out of memory, leading to crashes and job failures with explicit OOM errors