#comment parsed as incorrectly indented string in root block-scalar

[RedCMD]

Describe the bug
An error occurs when a #comment is one outdented than the (root level) block-scalar indentation-indicator indicates
Block scalar lines must not be less indented than their explicit indentation indicator

To Reproduce

abc: |5 # no error
      # string 6
     # string 5
    #comment 4
   #comment 3

---

|5 # error at #comment 4
      # string 6
     # string 5
    #comment 4
   #comment 3

Expected behaviour
#comment 4 should be parsed as comment, not as part of the multi-line string

Versions:

• Environment: VSCode 1.89
• yaml: 2.4.2

Additional context

[eemeli]

Yeah, there's something odd going on here. Probably to do with the -1 indent level that unindented nodes are considered to have.