While executing the command oc import-image, it skips several tags. No reason was given on why it skips these tags. 
The customer is  using the image "registry.access.redhat.com/ubi8/openjdk-8". The newest image tag is not present as versioned tag for "1.14-14.1675788284". It only has a tag  as latest.
As it is a bad practice to use the latest tag  in production environments.  They need it as normal and also expect the newest version tag additional to the latest tag. (as normally expected)

v.4.10.51

Always

1. oc import-image test-openjdk-8 --from=registry.access.redhat.com/ubi8/openjdk-8 --confirm --all=true --namespace=test-namespace

info: The remote repository contained 35 additional tags which were not imported: 1.14-14.1675788284, 1.14-14.1675788284-source, 1.14-3-source, 1.14-3.1661371529, 1.14-3.1661371529-source, 1.14-3.1661798447, 1.14-3.1661798447-source, 1.14-5-source, 1.14-5.1665493427, 1.14-5.1665493427-source, 1.14-5.1666624658, 1.14-5.1666624658-source, 1.3-12-source, 1.3-12.1622550094, 1.3-12.1622550094-source, 1.3-13-source, 1.3-14-source, 1.3-15-source, 1.3-2.1591609345, 1.3-2.1591609345-source, 1.3-2.1593143011, 1.3-2.1593143011-source, 1.3-2.1595330282, 1.3-2.1595330282-source, 1.3-3-source, 1.3-5-source, 1.3-7-source, 1.3-7.1608081529, 1.3-7.1608081529-source, 1.3-8-source, 1.3-8.1614713187, 1.3-8.1614713187-source, 1.3-9-source, 1.3-9.1617297653, 1.3-9.1617297653-source

All tagged images should be imported when '--all=true' flag is used.

As workaround, while the oc import-image command succeeds if individual tags are specified.

$ oc import-image test-openjdk-8:1.14-14.1675788284  --from=registry.access.redhat.com/ubi8/openjdk-8:1.14-14.1675788284 --confirm

$ oc get istag
NAME                                IMAGE REFERENCE                                                                                                     UPDATED
test-openjdk-8:1.14-14.1675788284   registry.access.redhat.com/ubi8/openjdk-8@sha256:b838fa18dab68d43a19f0c329c3643850691b8f9915823c4f8d25685eb293a11   9 seconds ago