Incosistent sorting of wrapped imports with --force-sort-within-sections

Please consider the following example:

from package import aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa88
from package import bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb89
from package import cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc88

Sorting with isort --profile black --force-single-line-imports --force-sort-within-sections example.py produces (IMO) unexpected results:

from package import (
    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb89,
)
from package import aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa88
from package import cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc88

Sorting with isort --profile black --force-single-line-imports example.py is fine:

from package import aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa88
from package import (
    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb89,
)
from package import cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc88

Sorting with isort --profile black --force-single-line-imports --force-sort-within-sections example.py, if all lines are longer than 88 characters, is also fine:

from package import (
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa89,
)
from package import (
    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb89,
)
from package import (
    ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc89,
)

Is this behaviour expected?

I'm using isort 5.10.1.

Reproduce the reported ordering with the three long imports using isort 5.10.1 and the shown --profile black, --force-single-line-imports, and --force-sort-within-sections options. Trace the sorting and line-wrapping behavior for imports near the 88-character limit, then verify that the resulting order matches the intended behavior described in the issue.