Replacing bases on sugars causes wrong sequence and canvas corrution

[AlexeyGirin]

NOTE: Common problem with all types of monomers wrapped into @ symbol on sequence mode

Steps to Reproduce

1. Go to Macromolecules mode - Sequence mode
2. Load from file: Replecing bases on sugars causes wrong sequence and canvas corrution.zip
3. Select last monomer monomers (in view mode)
4. Go to Library - RNA tab - Sugars
5. Click on "R" sugar On appeared dialog - click Yes

Actual behavior Starting from that moment things starts to go wrong:

1. Sequence disappears from the canvas rise the same dialog once again: Click - YES
2. Sequence appears on the canvas together with notification below: No available attachment points to establish bonds for merge.
3. Switch to Flex mode. Note that sequence is wrong:

Expected behavior

1. No second "Confirm Your Action" dialog
2. Sequence on the flex mode:

As per requirement:

.....4.2. If any of the selected symbols is @ (and it represents more that one monomer), modal window with a warning message should appear. Warning message: "Symbol @ can represent multiple monomers, all of them are going to be replaced. Do you want to proceed?". ..........4.2.1. "Yes" option -> all selected monomer(s) on canvas are replaced. (Images for better understanding) Go to sequence mode, select A and @: Click on C in the library, "Yes" in the modal window:

Versions

• Ketcher Version 2.24.0-rc.1 Build at 2024-08-06; 19:17:47
• Indigo Toolkit Version 1.23.0-rc.1.0-g85f89b8f5-wasm32-wasm-clang-19.0.0
• Windows 10 Pro
• Chrome Version 127.0.6533.100 (Official Build) (64-bit)

Related issue - https://github.com/epam/ketcher/issues/4878

[Zhirnoff]

Tested. Bug is not fixed. Instead of three sugars, the replace function changes it to one sugar.

Desktop:

• OS: Windows 11
• Browser Chrome
• Version 127.0.6533.120 (Official Build) (64-bit)

Ketcher version [Version 2.24.0-rc.2] Indigo version [Version 1.23.0-rc.2]