"oc adm top nodes" output return negative values

Issue

• While monitoring the node resource consumption, via oc adm top nodes, a few of the nodes have negative cpu consumption reported:

$ oc adm top nodes
node1.example.com    -1268m       -16%   34928Mi         90%
node2.example.com    588m         7%     17981Mi         46%
node3.example.com    -2740m       -36%   13311Mi         34%
node4.example.com    652m         8%     15749Mi         40%
node5.example.com    -1156m       -15%   32559Mi         84%
node6.example.com    1333m        17%    27690Mi         71%
node7.example.com    -2650m       -35%   17727Mi         45%
node8.example.com    1779m        23%    35939Mi         92%
node9.example.com    -2303m       -30%   21953Mi         56%