When you're using a spyglass, the bobbing animation on your left hand stops and it's positioned in the default pose without bobbing. This isn't in parity with Java at all, it's a small detail but noticeable once you take a closer look.
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Comments 3
Relates to MCPE-159486 (trident)
Affects 1.19.10 and 1.19.20.23 preview
Thank you for your report!
After consideration, the issue is being closed as Won't Fix.
Please note that this is not the same as Working as Intended, as this bug report correctly describes behavior in the game that might not be the intended or desirable behavior, but it will not be fixed right now. Sometimes, this is because the issue reported is minor and/or impossible to change without large architectural changes to the code base.
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affects 1.17.30.20