How files encrypted with EFS shared between two computers will be encrypted if edited and saved

Background: I have encrypted most of my data files on computer A using EFS. I sync those files with computer B using Syncthing. I have installed the EFS certificate from computer A onto computer B and vice versa. Both computers use Windows Pro and NTFS.

My question: If I edit a file that was encrypted on computer A on computer B and save it, will it be re-encrypted with the original encryption credentials from computer A or with one from computer B? I'm hoping that the answer is "it's always re-encrypted with the same encryption credentials," because I edit files on both computer and don't want a situation where some files are encrypted with one credential and others with the other.

If I would end up with files that have two different encryption credentials, does anyone know of another encryption program that is as flexible as EFS? I don't want to create separate containers I have to mount as drives, as with Veracrypt, if I don't have to.

Thanks!