I'll agree with that.
When I uploaded the first one you listed, using the .53 LTS editor, it reported firmware S2049
The second file using the .58 editor reported firmware S130
So they must be sending different firmwares from each version of the editor and on top of that different models even get different firmware versions too.
Those screens loaded and worked fine on my testing setups, I didn't run into any issues.
How are you connecting the Nextion screen? I'm using the Nextion port on a MMDVM_HS_Duplex hat, and I also tested it with a Zumspot v.06 simplex board too. So if you are using USB and a TTL adapter, then I need to retest.