So basically when I try to cycle through perspective to second and third whilst riding a horse, no glitch appears to happen until you do a full cycle and return to first person. This is when the player will suddenly change to a random direction rapidly.
My fingers were only on the W key and my toggle perspective key (which is designated "F" key). Didn't touch my mouse at all when the glitch happened
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Thank you for your report!
We're actually already tracking this issue at MCPE-54715, so I will resolve and link this ticket as a duplicate.
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