I just discovered this after playing the new snapshot; I was riding a Strider around the nether, and after getting on, I can't get back on the strider. Something else I found was that thrown items were thrown as if I was still on the strider. This is true for arrows as well. It seems like the game still thinks I'm riding the strider.
Here is a video if you need more details.
https://www.youtube.com/watch?v=g4-1cB-4Cw8
Update: I found something else while experimenting a bit more after I made the video; shooting an arrow upwards and letting it hit the strider makes the player take damage. When the strider died to a ghast, it teleported me to where the strider was when it died.
Thank you for your report!
We're actually already tracking this issue in MC-175999, so I resolved and linked this ticket 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 in the future to see if the issue has already been reported.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki