A shrinking recovery window is one of the clearest escalation signals in service work. If a machine still comes back after restart but the stable interval keeps getting shorter, the system is often showing that a hardware margin is narrowing rather than randomly misbehaving.
What this failure pattern usually looks like
The system recovers after restart, but each return to normal lasts less time. A platform that once stayed stable for hours may now drift again after a much shorter interval, especially under real workload.
Why the visible symptom can mislead engineers
Because recovery still exists, teams may keep treating it as partial health. But shrinking recovery usually means the machine is becoming easier to destabilize under the same conditions, which is the opposite of reassurance.
What to inspect first
Track the length of recovery windows over repeated cycles. Compare behavior against runtime load, thermal state, and activity level to see what accelerates the return of instability.
Why earlier correction matters
Once the recovery window collapses entirely, the diagnostic advantage of the pattern is reduced. Acting while the trend is still visible makes the weak layer easier to isolate.