How about a temporary vulnerability in the Electrum 4.02 version? What do you think about that?
It's not possible unless you downloaded a fake version of electrum where there is a possibility of hackers sneaking it in onto the official website in case the temporarily hijacked it, that's why they always emphasize, do not trust, always verify. Did you verify the signatures before installing the file?
Your seed will always generate the same addresses regardless of the software version you are using, so long as it's the same address format and derivation path.