Hello Mojang Studios, I'm from Russia so sorry for my English. I found a bug in which an ancient fragment breaks TNT and does not fall out. The bottom line is that if you constantly move the ancient fragment with the piston ,and then blow up TNT, then the ancient fragment will disappear.
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Thank you for your report!
We're tracking this issue in MC-123217, so this ticket is being resolved and linked as a duplicate.
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Please could you provide some screenshots or videos of this issue occurring whilst the F3 Debug screen is enabled. This would help myself, along with others, determine what the problem is, as this ticket it quite difficult to understand. Thanks!