I have seen several reportings of the same problem in Korean Smartthings Community. It was fine before the update.
device controller screen shows just blank screeen with only device name on it.
Also, devices with my custom Hue dimmer switch DTH, which has almost same structure with ikea button DTH, suffering from same problem. It was just fine before.
It seems like devices with child switches as components are having the problem.
It needs to be fixed.