When flying when an elytra against most non-full blocks (Fences, iron bars, glass pains) it makes a footstep noise. This probably effects all versions 1.9+, although I have only tested it on 1.12 and 1.12.2. This does not happen with full blocks.
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Thank you for your report!
However, this issue is a Duplicate of MC-128994. (A similar issue exists in much earlier versions: MC-2604, which affects other movement inside of blocks).
It has been linked to this report. If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.
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