have a litle trouble

algo heavy

cards rx470-570 4gb
double treads work fine
in config "intensity" : 29, "double_threads" : true

single treads dont work with error
Error CL_INVALID_BUFFER_SIZE when creating scratchpad buffer for DeviceID 0 (Thread 0)
in config "intensity" : 57, "double_threads" : false

if set intensity 0 setting 44 and slow rate
same rig work fine with config "intensity" : 58, "double_threads" : false
same drivers version 18.2.1 same swap size 60gb for 12 card same windows version 1709