https://bugs.winehq.org/show_bug.cgi?id=42233
--- Comment #2 from Michael Müller michael@fds-team.de --- The regression test instructions won't help here as they do not contain information about Wine Staging.
I tried to reproduce the issue using the CD version and was unable to do so (with and without overrides). Could you try to install the game in a fresh wine prefix to make sure that no further steps are required to trigger the bug (installed plugins etc.)? Just prepend WINEPREFIX="$HOME/.wine-regression" before each Wine invocation and install steam + oblivion.