Okay, I'm maybe less confused about the "it's fixed in >134": the crash occurs in 135 and up (I haven't tested below that) when using chrome style in our app (which utilizes CefBrowserHost::CreateBrowser()). With alloy style it doesn't crash, everything else being identical. This happens, for me, when swapping a touchscreen capable device in Windows 10 from tablet mode to desktop mode. Going to try cefclient.
EDIT: cefclient --use-native crashes when swapping between modes using the latest 137 build.
