In the Minecraft Bedrock version 1.20.81 the tnt canon was shooting straight dow, but now every update after the 1.20.81 the canon doesnt work anymore. i provided a map with 3 preloaded tnt canons which are for testing in each older and newer version to see exactly what i mean. 

1. Step: Testing one canon in version 1.20.81
2. Step: See if the canon shoots straight down which i would expect and did in that version.
3. Step: launch the newest minecraft version
4. Step: Testing the canon once again 
5. Step: See that it doesnt shoot straight down anymore

So something has changed so that tnt doesnt get the right momentum as it got after an update suddenly. because it hasnt been in the change logs and i dont know why the tnt physics changes.