When BUD powering a piston next to a grass block, this one don't update when the grass is being eaten by a sheep, I found similar report from version 1.5 and despite being marked as "resolved" it's not resolved at all, I don't think this is an intentional feature.
Thank you for your report!
We're tracking this issue in MC-5898, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
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