Hi you can reset the settings of the phone to address this issue. As I do have similar issue with the call/phone app crashing everytime I make a call and the only way I got around this was resetting all settings. This is different from factory reset, as it will only reset the settings of your phone to its original settings. The upside to this is that it will not wipe your phone off all your data, it will only reset the settings of all your systems apps i.e camera settings, phone settings, Bluetooth, WiFi, call settings, messaging app settings etc.