Issue
If you jump a horse with full thrust on a piece of farm land, it will get converted to dirt and the horse will sometimes throw you off. When it does however, you don't register as being thrown off - you can move but you're technically still on the horse, pressing E will open the horse inventory (I think, not sure), pressing the dismount key will actually teleport you back to the horse.
Repro steps - explained above
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However, we are already tracking this issue, and this report is a Duplicate of MC-191714, which is a report that has not been resolved yet.
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