Last August (2019) I ordered from seller "cctv008008" and the chips were marked as expected. I ordered from "everbuyingo" and got chips marked "CKS32F103". The CKS chip appears to have 64k of flash, as I wrote earlier.
I do not remember if the one I tested at 128k flash was from "cctv008008" or an earlier purchase. I will do a test on one from that seller.
I should probably start marking my boards when I get them, or keep them in marked containers.
I had a similar story with the W1209 boards. The good ones have an STM8S003, and I have a lot of libraries for that chip. But some of them have a Nuvotron 8051 family chip, and I can't do anything useful (*) with those. I could have complained "not as described", because the picture shows an STM8S003. But the text does not say what CPU it has.
I think that in the big picture, the seller has no idea exactly what the warehouse will send, and adding a comment won't help.
(*) Well, I can always use them as thermostats.