My giant chests disappear

Game mode: [Online | Singleplayer]
Problem: [Crash | Bug | Performance | Misc]
Region: [Here]
France officiel serveur 2200 europe my gametag XCHEROK EEx1000

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hello my giant chests disappear with the items found in it and I can not build because when I wear foundations I crash

Steps on how to reproduce issue:
1.18 or 19 may
2.21and 22 may