Minecart on powered rails causes severe lag / stutter

I am having this same issue - when riding a minecart at high speeds it lags really bad. both sound and picture lag/stutter severely. My friend is having the same issue as well. This is on a Minecraft Realms server using Windows 10 Edition. I've also tried it in Minecraft VR on the same server and have the same issue.

My friends and I also have this problem. It occurs on any device we're using with Realms. It does not occur when I load a locally saved world. I notice that the lag starts just before I hit top speed. If the mine cart slows down it disappears. The jittery noise and video force me to mute my volume and leave my system till the ride is over.

Windows 10 edition and Pocket edition are affected.
Currently using 1.0.3

We (myself and 2 sons) also have this issue using Minecraft Realms. I am using Minecraft Windows 10 Edition, and the boys use Ipads. Stuttering does not occur immediately, but with long powered minecart rides begins after 10+ seconds of travel, and is then quite persistent. Both video and Audio stutter every few seconds, although it is somewhat random (there can be a few seconds of smooth riding, then several seconds of stuttering).

If I choose "download world" from realms and then select the local copy, there is no stuttering (the entire ride is smooth).

Internet connection is 100Mb fibre.

This happens to my friends (5 of them) and I on the Xbox One S. It stutters a lot while riding the minecart. It's quicker to walk than ride. This only happened after installing 1.5.1. It was fine before it. My friend and my internet connection is around 100Mbs. I hope this gets fixed soon.

Confirmed in 1.9 realms are laggy the rails usually stuck and don't move smoothly

Same here. I have an high end pc with powerful connection and with local saves everything is smooth, but when I ride carts on minecraft realms it starts to lag really bad and totally ruins the point of having rails. 

Also to point out: previous version wasn't so bad, it definitelly accentuated with the last version

Bedrock edition on windows 10, v.1.9.0

Same.

Problem seems much worse in Nether Update.

Resolving as a dupe of REALMS-1887, as this is tracking lag / slow chunk loading since 1.16.

Experiencing such bad lag... It is at the point of being unplayable. Rails not working properly, we have had issues when landing softly with elytra players die, cause lag caused them to go down harder, because world is not loading chucks as it used too. Players mine blocks break, when they move forward the blocks spawn back and causes players to suffocate in walls, and loose all of their gear and inventory, this has happened now 3 times. Lava that spews from holes in the nether while mining stops and then runs again and all of a sudden players burst into flames, or only has 1 heart left or dies, because they have been burning without knowing due to the lag. This is a service that people pay to use, but it looks like this issue is not getting resolved, and we have lost people on the Realm due to this lag situation. It is currently NOT PLAYABLE, and should be fixed. We are about to kick Minecraft completely and switch over to other games, and we are a maximum of 10 players, and we know a lot of people experiencing the exact same issue, and we see this on the thread as well. We have experienced all of the above mentioned issues by other players as well. Minecraft is our relax time, and some of us try to stream, but how at this point and time? This game had become a taxing and time consuming pain, where it used to be a fantastic get together and relaxed pleasure.

Me too - although only in the past week - lagging on mine carts on Realms makes mine carts unplayable

I have a city save file with lots of powered rail. Minecarts run fine normally on my PC save game but if uploaded to my Realm, they are unusable with severe lagging and stuttering on PC and Xbox. Please consider this bug, as Realms is a subscription service.