I think more research on the topic of bugs with droppers and pistons should be done because as far as i can tell the have been acting as the same block, the dropper, (as far as i can tell) has only been able to drop an item into the inventory of a different dropper in one direction.
There are other bugs on this topic plz look into this it is very limiting for** Bedrock* *redstoners
this has went on for 1 or two updates
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Cleaning up old tickets: This ticket had been set to 'Awaiting Response', but has not received a response from the reporter (~3 months+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.
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Can you provide a video of the incorrect behavior? Dispensers at least, I believe, are supposed to be able to equip armor onto players.