KV write misses

We have been using KV for more than 6 months now.
Since June 23, 00:00 UTC, we are observing latency in KV updates. We write some time sensitive data to KV every 10 mins and our monitoring script keeps checking the time validity of this data.

Upon further debugging, its observed that some writes to KV is not reflecting on subsequent reads, and only upon the next write the data gets reflected!

What could this be?