There have been recent changes, you need to go to Options > Video > Display Performance Stats > Advanced > Latency (formerly RTT) set to ON to correct this.
Details:
Prior to patch 1.21, Overwatch maintained two estimates for your network quality: RTT and ping. Your RTT (round trip time) was measured as the time between sending a packet to the server and hearing a response, which included some application processing time on both ends. Calculating your ping, on the other hand, required us to timestamp every packet at the exact moment it was sent or received, something that became much more expensive after we patched for Meltdown & Spectre. Without these ti…