I saw it mentioned here the other day and on Reddit recently. I'm assuming it's still an issue and hasn't been fixed via a firmware update. Others may know more about it. I've never used ADATA but it's not a brand I know a lot about and avoid.
If we're talking about the newer low-end Samsung 980 (non-PRO) that's DRAMless, then the ADATA Gammix S11 Pro will definitely be faster, even if we don't know exactly which NAND flash memory they're currently using. https://www.anandtech.com/bench/product/2793?vs=2768