MSI Titan 18 HX AI 5090 issue

Experienced an odd issue with my 2025 MSI Titan 18 HX AI, with the latest 5090 GPU. We were gaming on Scum, graphics set to maximum (Epic) and running the laptop to a Super Ultra Wide monitor, so running at full resolution.

After about 30 minutes, the touchpad flashed a few colours and then suddenly the game quit from the online servers. It was still running but my WiFi adapter seems to have disappeared.

I rebooted the laptop and all was working again, but it did exactly the same again after 15 mins more gaming.

I then reduced the resolution and turned on the full fan mode (keyboard shortcut) and it worked fine from that point onwards, but is this a defect? Surely the laptop should be handlng overheating in a far better way?