%PERIODICSEARCHCONF - relation to EMM reject cause

nRF9160, mfw 1.3.5, NCS 2.4.2

Using %PERIODICSEARCHCONF I currently faced two issues:

1. the device doesn't go to sleep

2. the device isn't able to register to the network without CFUN=0/CFUN=1.

I tried to do a research on this topics and I found two other tickets:

NRF9160 EMM reject #11 behavior (mfw 1.3.2)

Network search behavior

Both pointing to a relation of the EMM reject cause and the sleeping mode.

Is it possible, to get a list of the of those reject causes, which turns the device into sleeping mode between the searches?

I assume, that the modem consider this reject causes also when it it comes to retry the registration. Is there also a list of such reject causes, which prevents the modem from consider to retry a registration?