Does anyone else use notes extensively with src blocks and results
drawers? It seems that the regex to parse src blocks and collapse them
breaks on drawer :END: markers and possibly other things.
I don't use LOGBOOK, but I was able to confirm this problem based on your example.
But then I looked in the manual, and in (org) Drawers node, it's mentioned:
> Sometimes you want to keep information associated with an entry, but you
> normally don’t want to see it. For this, Org mode has _drawers_. They
> can contain anything but a headline and another drawer.
*They can contain anything but a headline and another drawer.*
So I guess you have hit a limitation.