CRBasic is using a lot of CPU when scrolling ('very high' on the resource monitor). Tested with Loggernet 4.7 (CRBasic 3.9). The scroll 'lag' makes the software difficult to use. When using auto-indentation, the screen flashes white for 1s. Appears like CRBasic is constantly redrawing.
I have downgraded to Loggernet 4.5 and the issue was gone. Now patched to 4.6 and the scroll lag is minimal but present.
Notepad++ on the same piece of code suffers no issue.