Hello!
I have doing Redstone for years but this is the first time I saw my stand and gravel destroy themselves in a build. i put the sand/gravel ontop of a piston to shorten a pulse and I see it works, use it for real in the build doesn't work, have a look to find the sand/gravel gone.
Thank you for your report!
However, this issue is Invalid.
Your game, launcher or server is modified.
If you can reproduce the issue in a vanilla environment, please recreate the issue.
Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
Any plugin issues need to be addressed to the creator of the plugin or resource pack.
If you have problems on large servers like Hypixel, please contact them first as they run modified server software.
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