I have a dictionary provided in the minimal reproducible example below. The biggest intersection subset in it is size 4 between 'AUT01-DN02' and 'AUT01-DN03'. However, this subset is not shown on the plot, even with sort_by='cardinality', which is supposed to sort by subset size. But, when the upsetplot is plotted from the dictionary only containing these two entries, the right intersection size shows up.

I'm not entirely sure what causes this behavior, maybe I'm missing out on something.

Minimal reproducible example:

`
import matplotlib.pyplot as plt
import upsetplot

full_dict = {'AUT01-DN13': {'HLA-A02:05',
'HLA-A11:01',
'HLA-B40:02',
'HLA-B58:01',
'HLA-C02:02',
'HLA-C07:01'},
'OVA01-DN281': {'HLA-A11:01',
'HLA-A26:01',
'HLA-B08:01',
'HLA-B35:01',
'HLA-C04:01',
'HLA-C07:02'},
'AUT01-DN05': {'HLA-A01:01',
'HLA-A11:01',
'HLA-B07:02',
'HLA-B49:01',
'HLA-C07:01',
'HLA-C07:02'},
'AUT01-DN03': {'HLA-A01:01',
'HLA-A11:01',
'HLA-B15:01',
'HLA-B35:01',
'HLA-C03:03',
'HLA-C04:01'},
'AUT01-DN02': {'HLA-A11:01',
'HLA-A68:01',
'HLA-B15:01',
'HLA-B35:03',
'HLA-C03:03',
'HLA-C04:01'},
'AUT01-DN12': {'HLA-A02:01',
'HLA-A11:01',
'HLA-B15:01',
'HLA-B35:01',
'HLA-C03:04',
'HLA-C04:01'},
'AUT01-DN08': {'HLA-A32:01',
'HLA-A68:01',
'HLA-B15:01',
'HLA-B44:02',
'HLA-C03:03',
'HLA-C07:04'},
'THY01-DN4': {'HLA-A02:01',
'HLA-A26:08',
'HLA-B15:01',
'HLA-B44:02',
'HLA-C03:04',
'HLA-C05:01'},
'AUT01-DN17': {'HLA-A03:01',
'HLA-A24:02',
'HLA-B35:03',
'HLA-B45:01',
'HLA-C04:01',
'HLA-C16:01'},
'AUT01-DN09': {'HLA-A24:02',
'HLA-A30:01',
'HLA-B13:02',
'HLA-B35:08',
'HLA-C04:01',
'HLA-C06:02'},
'AUT01-DN14': {'HLA-A02:01',
'HLA-A68:02',
'HLA-B14:02',
'HLA-B27:05',
'HLA-C02:02',
'HLA-C08:02'},
'THY01-DN3': {'HLA-A24:02',
'HLA-A25:01',
'HLA-B18:01',
'HLA-B41:01',
'HLA-C12:03',
'HLA-C17:01'},
'AUT01-DN11': {'HLA-A01:01',
'HLA-A69:01',
'HLA-B37:01',
'HLA-B49:01',
'HLA-C06:02',
'HLA-C07:01'},
'THY01-DN5': {'HLA-A01:01',
'HLA-A03:01',
'HLA-B07:02',
'HLA-B07:06',
'HLA-C07:02',
'HLA-C15:05'},
'AUT01-DN04': {'HLA-A02:01',
'HLA-A23:01',
'HLA-B27:05',
'HLA-B50:01',
'HLA-C02:02',
'HLA-C06:02'},
'THY01-DN1': {'HLA-A03:01',
'HLA-A29:02',
'HLA-B07:02',
'HLA-B44:03',
'HLA-C07:02',
'HLA-C16:01'},
'AUT01-DN15': {'HLA-A01:01',
'HLA-A02:01',
'HLA-B08:01',
'HLA-B44:02',
'HLA-C07:01',
'HLA-C07:04'},
'AUT01-DN16': {'HLA-A01:01',
'HLA-A24:02',
'HLA-B08:01',
'HLA-B41:01',
'HLA-C07:01',
'HLA-C17:01'},
'THY01-DN6': {'HLA-A01:01',
'HLA-A25:01',
'HLA-B13:02',
'HLA-B39:01',
'HLA-C06:02',
'HLA-C12:03'},
'OVA01-DN278': {'HLA-A02:01', 'HLA-B44:02', 'HLA-C05:01'}}

show intersection of size 4

print(full_dict['AUT01-DN03'] & full_dict['AUT01-DN02'])
full_contents = from_contents(full_dict)
ax_dict = UpSet(full_contents, sort_by='cardinality').plot()
plt.show()

however, for

part_dict = {'AUT01-DN03': {'HLA-A01:01',
'HLA-A11:01',
'HLA-B15:01',
'HLA-B35:01',
'HLA-C03:03',
'HLA-C04:01'},
'AUT01-DN02': {'HLA-A11:01',
'HLA-A68:01',
'HLA-B15:01',
'HLA-B35:03',
'HLA-C03:03',
'HLA-C04:01'}}
part_contents = from_contents(part_dict)
ax_dict = UpSet(part_contents, sort_by='cardinality').plot()
plt.show()

`