Today the loading problem appears again even the non-marketplace versions of HK city times and Macau were used. I just found a function in MSFS Addons Linker which checks if the addons have the same file names, which might cause potential problems. Here are the results:
As you can see there are multiple files in SamScene3D’s HK city times and Macau sharing the same file names. I don’t know if this really relates to the loading or CTD issue, but the link provided by the addon checker function might give some hints:
Is there anybody who also has the loading problem even using the non-marketplace version?