Not the case. What’s happening here is Windows is removing the ext4 partition completely, expanding the ntfs partition and writing to all of it.
Windows update did that to my <1 year old laptop. I figured it had just wiped out grub, but when it was booted from a live-usb there was no ext4 partition there at all. This has been reported many times.
Microsoft should be sued for this shit. Legal protection from destroying people’s data that is not part of Windows or in a Windows partition, whether deliberately or by negligence, is not something that can be legitimately covered by a license agreement.
A friend’s neighbor just fell for this. She received a call from the “nicest” Microsoft tech and decided she’d let them into her PC. Within 10 minutes after hanging up she received a call from her bank asking if an $800 debit was valid. It took her weeks to clean up the mess.