We have just uploaded a new release build of Wisej (1.3.13).
You can either download it at https://wisej.com/builds
or use our AutoUpdater tool.
Build 1.3.14 and the updated sample download fixes this problem.
Logged as issue WJ-7827, will be fixed in the next build.
FYI the regression is also present in 1.3.12, but downgrading to 1.3.8 fixed it.
I believe I was running 1.3.6 before — after updating to 1.3.13 the ListView.SelectedIndexChanged event no longer fires.