When I use plugin iVysilani, Kodi froze after 10 minutes. It is same on OSMC and OpenElec (czech comunity told me), but it is fine on Mac OS.
Somebody found solution for OpenElec (change settings in config.txt):
gpu_mem=320
gpu_mem_256=112
gpu_mem_512=160
gpu_mem_1024=256
arm_freq=1000
core_freq=500
sdram_freq=500
over_voltage=1
initial_turbo=30
hdmi_ignore_cec_init=1
max_usb_current=1
But it is possible that it is some memory leak. Log from OSMC before crash