If the root reaction has similar reactants, a cascade reaction is built only to the first reactant and creates an additional reaction for the second reactant

**Steps to Reproduce**
1. Add to Canvas RDF with 3 reactions:
[!issue-load-separate-reaction-new.zip](https://github.com/user-attachments/files/17057521/issue-load-separate-reaction-new.zip)

**Actual Result**
- One reaction is positioned separately from the cascade:

**Expected Result**
- Reaction is a part of cascade reaction:

**Environment details**
- Tested on CI CD master SA environment
- Ketcher [Version 2.25.0-rc.1] Build at 2024-09-18; 05:59:24
- Indigo Version 1.25.0-dev.1.38-gdbf49deb-wasm32-wasm-clang-12.0.0
- Windows 11 Enterprise
- Chrome Version 128.0.6613.138 (Official Build) (64-bit)

**Notes**
- It's also can be reproduced for save, load from Ket:
[ketcher (6).zip](https://github.com/user-attachments/files/17573367/ketcher.6.zip)
Make a save/load to/from RDF:
- This case must be automated after fix;
- Issue is detected during exploratory testing of Load RDF feature for cascade reactions - https://github.com/epam/Indigo/issues/2102