Here is a 2019 Root article going into some of this and how thousands of votes disappeared, I dont know if they looked into vote switching there. They cite the same Coalition for Good Governance in this suit. - https://archive.is/712UM#selection-1423.230-1423.300
This is a good article to read to review their analysis they used and thinking about using it on this election.
Article title: Thousands of Black Votes in Georgia Disappeared and No One Can Explain It
(and I don't think it was a disenfranchising thing there, but probably a failure that affected the candidate those voters were voting for)
“The disparity in undervote rates by voting technology strongly suggests that malfunction, misconfiguration, bugs, hacking, or other error or malfeasance caused some DREs [direct recording electronic voting machines] not to record votes in the lieutenant governor’s contest,” Stark explained, according to court documents.
Here is a 2019 Root article going into some of this and how thousands of votes disappeared, I dont know if they looked into vote switching there. They cite the same Coalition for Good Governance in this suit. - https://archive.is/712UM#selection-1423.230-1423.300
This is a good article to read to review their analysis they used and thinking about using it on this election.
Article title: Thousands of Black Votes in Georgia Disappeared and No One Can Explain It
(and I don't think it was a disenfranchising thing there, but probably a failure that affected the candidate those voters were voting for)