Hi, I have the same issue in this article
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuj78368?emailclick=CNSemail
I am running iosxr 4.3.4, I installed 5.4.3 version but I still have :
0/0/CPU0 ASR9001-LC BRINGDOWN PWR,NSHUT,MON
can any one already had this problem .
thanks