Some query bonds are replaced with Single bond after converting Mol into SMILES-format

[AndreiMazol]

Steps to reproduce:

1. Create Mol file that contains the following types of bonds: 5, 6, 7, 8 (or use mol_example.zip)
2. Convert created Mol file into Extended SMILES by calling /v2/indigo/convert.
3. Convert generated SMILES file into Mol format by calling /v2/indigo/layout
4. Compare original and generated Mol files.

Expected result:

Bond types from original model are equal to bond types from generated model.

Actual result:

Bond types 5, 6, 7, 8 in resulted model are replaced by 1.

[AndreiMazol]

Link to original issue