I had ridden my horse around 2000 blocks in my survival world. I accidentally removed the saddle while I was on the horse, and was instantly teleported from -7054, 67, -8954 to -5921, 64, -9020 without my horse. This wasn't a coordinate I had been at before, as it was inside of a stone block. I also threw my sword when I teleported, though I do not know if that affected anything. I am unable to provide an attachment at this time, as I was having difficulties getting the screen capture from my xbox to my phone.
Update: I have just reached the Horse again an, within about 10 blocks, it teleported me to where I would have been had I just dismounted the horse, which was still there. My sword, however, is gone
Thank you for your report!
We're tracking this issue in MCPE-172234, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki