Operating system: ubuntu 20.04
Graphics card: cpu
Short description of error
When you ad an annotation to a geometry node, by default the same annotations can be seen in all the other geometry nodes layout.
This is unexpected, since each geometry node layout should have its own annotations.
Exact steps for others to reproduce the error
Add a geometry node modifier.
Write something with the annotate tool.
Duplicate that geometry node modifier, erase the old nodes, the annotations, and you'll find out that you erased the annotation also from the first geometry node layout.