https://bugs.winehq.org/show_bug.cgi?id=43319
--- Comment #2 from Robert Walker bob.mt.wya@gmail.com --- Is this with: Steam build date 6 Jul 2017
Or: Steam build date 11 Jul 2017 ??
The 11 Jul 2017 client is a re-release of the 6 Jul 2017 client update. The 11 Jul 2017 client includes a change log entry: "Fixed missing game names for users with large Steam libraries"
Maybe an issue that is not specific to Wine?