This isn't an Ubuntu issue, it's a file system issue, but you did not give any information about the file system. Given 3 different systems, that points to really only 2 possible issues:
1. a corrupted ubuntu installation iso. Did you run the md5 hash test on the downloaded ubuntu installer?
2. you used btrfs, though even it is unlikely to fail on 3 different systems at the same time.
If you used a stable safe file system like ext4, then you can largely exclude the file system from suspicion.
Unfortunately if this was really on 3 different physical computers, you can also largely exclude RAM or Drive corruption, since the odds are just not in favor of such a conclusion, unless you don't have them attached to a UPS+surge protector and you had an electrical or weather/lightning event at that time.
You have to supply more information, ubuntu is just a set of packages with a kernel, it's the kernel / file system that will corrupt, so looking at ubuntu is a red herring.
Provide inxi -Faz
so we can see what you are doing, and so that actually relevant information is available for people who might be able to help you.
There's another possibility, since you seem to be trying the same tool on all systems, which is that the tool has a massive bug in it, any tool that can corrupt your file system even in theory should be dropped immediately until you determine the true cause of this event.
There's really no bigger bug or issue than file system corruption, and if it is in fact that tool, you neeed to post an issue report on their support/bug tracker right away, but you MUST supply real data, like inxi -Faz, or else nobody can help you.
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