What I expected to happen was that I was going to set the minecart on the activated rail and it would work just fine like normal and I could go back and forth between houses quickly and easily.
The thing that actually happened though was when I set the minecart onto the activator rail, the minecart started to do the shaking animation as if another player was breaking it. Whenever I try to enter the minecart it kicks me out right away, this doesn't happen when the activator rail is inactive
Steps to Reproduce:
1. Go into a single player minecraft 1.14.4 world and grab a minecart, redstone torch, and an activator rail
2. place down the activator rails and a redstone torch next to it then place the minecart onto the activated rails
Thank you for your report!
We're actually already tracking this issue in MC-79835, so I resolved and linked this ticket as a duplicate.
However, that ticket has already been resolved. Depending on the resolution, that can mean that it either will be fixed in the next version, or that it is not considered a bug and won't be fixed.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.