Description of problem:

When running node-density (245 pods/node) on a 120 node cluster, we see that there is a huge spike (~22s) in Avg pod-latency. When the spike occurs we see all the ovnkube-master pods go through a restart. 

The restart happens because of (ovnkube-master pods)

2022-08-10T04:04:44.494945179Z panic: reflect: call of reflect.Value.Len on ptr Value

Version-Release number of selected component (if applicable):

4.12.0-0.nightly-2022-08-09-114621

How reproducible:

Steps to Reproduce:
1. Run node-density on a 120 node cluster

Actual results:

Spike observed in pod-latency graph ~22s

Expected results:

Steady pod-latency graph ~4s

Additional info: