mdadm array degraded after new kickstart install

[pbirkbeck214]

I have kickstart partion 4 drives in the following way -

part raid.100000 --size=250 --ondisk=sda
part raid.100001 --size=250 --ondisk=sdb
part raid.100002 --size=250 --ondisk=sdc
part raid.100003 --size=250 --ondisk=sdd
part raid.100004 --size=50000 --ondisk=sda
part raid.100005 --size=50000 --ondisk=sdb
part raid.100006 --size=50000 --ondisk=sdc
part raid.100007 --size=50000 --ondisk=sdd
part raid.100008 --size=2048 --ondisk=sda
part raid.100009 --size=2048 --ondisk=sdb
part raid.100010 --size=2048 --ondisk=sdc
part raid.100011 --size=2048 --ondisk=sdd
part raid.100012 --size=1 --grow --ondisk=sda
part raid.100013 --size=1 --grow --ondisk=sdb
part raid.100014 --size=1 --grow --ondisk=sdc
part raid.100015 --size=1 --grow --ondisk=sdd
raid /boot --fstype ext3 --level=RAID1 --device=md0 raid.100000 raid.100001 raid.100002 raid.100003
raid / --fstype ext4 --level=RAID10 --device=md1 raid.100004 raid.100005 raid.100006 raid.100007
raid swap --fstype swap --level=RAID0 --device=md2 raid.100008 raid.100009 raid.100010 raid.100011
raid /local --fstype=ext4 --level=RAID10 --device=md3 raid.100012 raid.100013 raid.100014 raid.100015


After installation is completed mdadm --detail /dev/md0 md1 and md2 all show ok

But I get this with /dev/md3 - Any Ideas?

/dev/md3:
Version : 1.2
Creation Time : Tue Apr 3 13:51:53 2018
Raid Level : raid10
Array Size : 941203456 (897.60 GiB 963.79 GB)
Used Dev Size : 470601728 (448.80 GiB 481.90 GB)
Raid Devices : 4
Total Devices : 2
Persistence : Superblock is persistent

Intent Bitmap : Internal

Update Time : Tue Apr 3 14:46:08 2018
State : clean, degraded
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0

Layout : near=2
Chunk Size : 512K

Consistency Policy : bitmap

Name : xxxxx.xxxxxxx.com:3 (local to host xxxxx.xxxxxxx.com)
UUID : 75878e38:01f302ad:00ab175b:2d68d09d
Events : 4833

Number Major Minor RaidDevice State
- 0 0 0 removed
1 8 21 1 active sync set-B /dev/sdb5
- 0 0 2 removed
3 8 53 3 active sync set-B /dev/sdd5