Phobos OLE32.DLL exception when loading some Singleplayer missions

First check

[X] The issue happens on the latest official version of Phobos and wasn't fixed yet.
[X] I agree to elaborate the details if requested and provide thorough testing if the bugfix is implemented.
[X] I added a very descriptive title to this issue.
[X] I used the GitHub search and read the issue list to find a similar issue and didn't find it.
[X] I have attached as much information as possible (screenshots, gifs, videos, debug and exception logs, etc).

Description

If saving the game when a unit is attacking enemies' base structures, it will not load successfully, leaving no internal error thrown, nor useful information in debug.log. Debugger tells it raised exception at 0x76AFBB7 of ole32.dll while conflicts occured when writing to 0x1a84f1. Stack trace stopped at OleLoadFromStream(IStream* pStm, const_GUID & iidInterface, void** ppVObj) line 1101 of a socalled cmonimp.cxx.

Phobos Version

b28

Conditions to reproduce

Mod environment: Mental Omega 3.3.6, with cncnet5.dll, cncddraw renderer Mission: Soviet 24: Death's hand RA2MO: ToolTipDescriptions=yes ShowBuildingPlacementPreview=yes

Hold any building to be placed

INI code

No response

Steps to reproduce

After the debut, use the given 2 apocs rush to the closest enemy's conyard, meanwhile build something till complete and hold it
Attack the Epsilon barracks without actually destroying it.
Attack the Epsilon conyard and save the game immediately

The previous conditions are not strict, probably you don't need to have any building on hold or attack the barracks without destroying it 4. Load the game, it may crash when loading ...