I have the same problem on a new MacBook Pro 16" with M3 Pro and macOS Sonoma 14.2.1. In the low-power mode, two-finger scrolling is not recognized occasionally (while intensive browsing, every minute or so). I can move my fingers over the trackpad, but the cursor just doesn't scroll or move at all. After I lift my fingers, the touchpad continues to work as expected again. I noticed that while using Chrome, Safari, Slack and Activity Monitor, so it doesn't seem to be an application-specific issue.