Inconsistency in Solvent Positioning in SVG and PNG Export

**Preconditions**
1. Ketcher is launched.
2. Structures have been added to the canvas.
3. An arrow (any reagent arrow type) is present on the canvas.
4. Solvents from the Structure Library are added above the arrow.
5. The solvents are aligned vertically above the arrow.

**Steps to Reproduce**
1. Click the save icon.
2. Select 'SVG' format from the 'File format' dropdown.
3. Observe the preview and the saved file.
4. Select 'PNG' format from the 'File format' dropdown.
5. Examine the preview and the saved file.

**Actual behavior**
In the previews and saved files:
- Some solvents that are located above the arrow in the canvas are displayed below the arrow.
- There is an overlap, with some solvents stacking up on each other.

**Expected behavior**
The solvents located above the arrow should be displayed in the preview and in the saved file, maintaining their vertical alignment above the arrow.

**Screenshots**


**Desktop:**
OS: Windows 10
Browser Chrome
Version 119.0.6045.106 (Official Build) (64-bit)

**Ketcher version**
Version 2.15.0