Mesh disable time vary

Question

Dears, 
 I am working with mesh sdk 3.0 and 15.2 with soft device S140 nrf82840, our application using the mesh network topology for minimum amount of time then turn it on again after certain period, I tried to disable the mesh by command nrf_mesh_disable and wait for NRF_MESH_EVT_DISABLED event but I found it takes from 10-20 second on average to disable the mesh. 
 
 What I ask for is how to decrease this time to minimum amount of time, I need this time to be 2 sec at most! and why this time is varying? 
 I there are generic configuration like "NEXT_CONN_PARAMS_UPDATE_DELAY" and "CONN_SUP_TIMEOUT" could help to decrease this time?

Khaled Fayed · Answer

Thanks I will give a try but I found another solution could you also verify: 
 by using timeslot_stop(); and timeslot_start(); functions before nrf_mesh_disable and nrf_mesh_enable, It give me the required behavior but I am still testing for some time to catch if any possible bug found after hours of testing.