Operating system: Windows-7, 10, Linux
Graphics card: NVIDIA, Intel
Broken: version: 2.83 (sub 2), branch: master, commit date: 2020-02-11 23:45, hash: rB7e99e396a999
Short description of error
Grease Pencils / Annotations are in the file but are invisible as though you have them hidden/disabled from viewport/overlays.
The points can be seen in Edit/Sculpt/Weight Paint, but the actual strokes are only visible on Annotations, while you're drawing them.
I got this bug where sometimes the annotation will flip out and be visible and stick to the viewport but otherwise, nothing.