Seven or eight valence atoms with Dative bonds in the ring cause performance degradation for Add/remove hydrogens operation

[AlexeyGirin]

Steps to Reproduce

1. Load from file: Seven or eight valence atoms with Dative bonds in the ring cause performance degradation for Add-remove hydrogens operation.zip
2. Press Add/Remove implicit hydrogens button

Actual behavior System turns into infinite calculation (for Valence=7 it took 76 seconds to calculate) But if you delete one bond (i.e. make it not cycle) - it works very fast NOTE: For Ring Topology of bonds - it works fast! NOTE: For Hydrogen bonds - same problem - works extremely slow (but with ring topology - fast)

Expected behavior It works as fast as not cycled molecule with same number of atoms

Ketcher version [e.g. v2.4.2].

• Indigo Toolkit Version 1.18.0.0-g73c32dec3-wasm32-wasm-clang-12.0.0
• Ketcher Version 2.19.0-rc.2 Build at 2024-03-11; 12:30:30
• Chrome Version Version 122.0.6261.112 (Official Build) (64-bit)
• Win10
• Issue found while testing https://github.com/epam/Indigo/issues/1436

[AlexeyGirin]

Moved to Refined Backlog since not fixed over 2 releases