Things have always been iffy. No one knows for sure.
Edit: That link is the most recent example. Googling for voting machines themselves would bring more examples. Every election cycle we go through reports of malfunctioning, no audit, audit not matching, extra machines appearing, machines being taken around by politically connected, even things like pressing any button on the machine voting for the same party…etc., but ECI has been pushing it aside and refusing to open up. This recent one became an issue because the manipulation (allegedly) went a layer deeper into the voter rolls themselves and they are public data.
https://www.bbc.com/news/articles/cj9w43p7741o.amp
Things have always been iffy. No one knows for sure.
Edit: That link is the most recent example. Googling for voting machines themselves would bring more examples. Every election cycle we go through reports of malfunctioning, no audit, audit not matching, extra machines appearing, machines being taken around by politically connected, even things like pressing any button on the machine voting for the same party…etc., but ECI has been pushing it aside and refusing to open up. This recent one became an issue because the manipulation (allegedly) went a layer deeper into the voter rolls themselves and they are public data.
We don’t know what’s up with the machines.