[BUG REPORT] Diff status always returns CLEAN inside CM

[hhsecond]

Describe the bug
Diff status always returns CLEAN inside CM

Severity

Select an option:

• Data Corruption / Loss of Any Kind
• Unexpected Behavior, Exceptions or Error Thrown
• Performance Bottleneck

To Reproduce

from hangar import Repository
import numpy as np


repo = Repository('.')
repo.init(user_name='me', user_email='a@b.c', remove_old=True)
co = repo.checkout(write=True)
co.add_ndarray_column('x', prototype=np.array([1]))
co.commit('added columns')
co.close()

co = repo.checkout(write=True)
x = co.columns['x']


with x:
    for i in range(10):
        x[i] = np.array([i])
        print(co.diff.status())  # this should return DIRTY but returns CLEAN
print(co.diff.status())  # this returns DIRTY as expected
co.commit('adding file')