I’m on my second Input Cover from this specific issue and just started experiencing it again, it’s definitely a hardware problem. See [RESOLVED] Framework13 Keyboard has intermittent keys - #13 by Matt_Hartley and Some keys not working - #7 by Be_Far . CC @Matt_Hartley
On this (second, 13th gen model) input cover, I’ve disconnected the connector exactly once to add a memory module and that was months ago. This is likely not a connector wear issue and is something in the input cover or mainboard directly.