Built-in timer for Speedrunning, that doesn't stop when pausing

Minecraft speedrunners are starting to abuse pauses since they don't stop the current timer of the game (which is officially used for speedrunning). I know it's not unfair because everyone can do it, but makes the runs dull and unpleasant to watch.

I mean, you can even pause the game and take a look to your seed, then open Minecraft using the same seed on an alt computer, and find the best route for your run.

So I think we should get either a Built-in timer that doesn't stop when pausing, or make it so the game keeps running when pausing, just like Bedrock Edition.