Let's be clear I DID NOT have irfanview 32bit installed and it's NOT the only app I've noticed this on, despite the limited selection. It's just that I could make a screenshot on a fairly fresh W10 install which exhibits the issue.
On some machines I actually installed 32bit by accident, having both irfanviews, other times I gave in and uninstalled 64bit to avoid reoccurence. On my parents office PC I installed 32bit to avoid this issue, which in my experience is totally reproducible, I simply install W10, remove IE and install some "essential" apps, including CCleaner & irfanview.
This has happened to me on clean W10 installs multiple times, it was present on a recent install on a different machine, which unfortunately expired on Sunday, which meant I moved and ran the update advisor on a desktop.
I don't think I've had it happen with 7zip though, which I can install via 64bit MSI, whereas ifranview provides a self extracting .exe and a SHA256 sum to check.