jungle temples loaded and raided in previous versions are deleted from the world entirely upon re-loading and the chunks and replaced with trees making it look like they were never there. I had looted all 3 temples and when I had returned they were all gone. I am not sure how to reproduce this, all I know is that I loaded the chunks in 1.11 but only noticed they were gone when I returned in 1.14.

seed: -1134764334

1st temple coordinates: 565 99 1030

2nd: 1050 99 520

3rd: 1111 99 1245