[Rdkit-discuss] sanitization removes Hs - is this expected?

[Michal K. <mic...@gm...>]

Hello, I have just noticed this:
>>> Chem.MolToSmiles(Chem.MolFromSmiles("[H]c1c([H])sc([H])c1[H]"))
'c1ccsc1'
>>> Chem.MolToSmiles(Chem.MolFromSmiles("[H]c1c([H])sc([H])c1[H]",sanitize=False))
'[H]c1sc([H])c([H])c1[H]'
>>> Chem.MolToSmiles(Chem.RemoveHs(Chem.MolFromSmiles("[H]c1c([H])sc([H])c1[H]",sanitize=False)))
'c1ccsc1'
>>> Chem.MolToSmiles(Chem.MolFromSmiles("[H]c1cscc1[H]"))
'c1ccsc1'
>>> Chem.MolToSmiles(Chem.MolFromSmiles("[H]c1cscc1[H]",sanitize=False))
'[H]c1cscc1[H]'

Is it the expected behaviour? Why does sanitization remove hydrogens?
Is it controlled by any of the SanitizeFlags?

Best wishes,
Michal