System freezes on sleep after heavy gaming session (SteamOS 3.8.14, Legion Go 2)

When I put the Legion Go 2 to sleep immediately after playing a heavy-load game, the system freezes and requires a force restart. The power button light pulses purple instead of turning white.

Expected Behavior:
System should enter sleep mode normally with white power indicator light and wake on demand.

Actual Behavior:

• Power button light pulses purple (sleep mode fails)
• System becomes unresponsive
• Requires 10+ second power button hold to force restart

Workaround:
Exiting the game and letting the system idle for a few minutes occasionally allows normal sleep mode (white light indicator) and wake functionality.

System Information

• Steam client version: 3.8.14 stable
• Distribution: SteamOS 3.8.14
• Opted into Steam beta: No
• System updates checked: Yes
• Hardware: Lenovo Legion Go 2
• CPU: AMD Ryzen Z2 Extreme (8 cores, 16 threads, Zen 5 architecture)
• GPU: AMD Radeon 890M
• RAM: 32GB LPDDR5X

Steps to Reproduce

1. Launch a heavy-load game
2. Play for a period of time
3. Immediately press power button to sleep
4. Observe purple pulsing light and system freeze

Start by reproducing the failure on the listed SteamOS 3.8.14 and Legion Go 2 hardware: run a heavy-load game, press the power button immediately, and observe the purple light and freeze. Compare this with the idle-after-exit workaround; the issue is done when sleep, the white indicator, and wake-up work reliably after gaming.