There’s been 2 main issues that I’ve been experiencing recently, as the aforementioned streak issue has resolved itself, and the other one has already been documented and said by @varactyls.
The first of which is one that revolves around the other person while trading, as their own duplicates and cards are showing up as if they don’t have them
The second one is one that shows up when the drop down tab begins to include singles.
Hopefully there’ll be a fix to this soon, as the first issue happens about 25% of the time while I trade on the website. Although, the second one rarely happens, so thank you when it does get fixed.