Sand bags, sea walls not shown. Sea wall graphic glitch

1. Sand bags and sea walls cannot be seen when placed on the ground/ocean. They look invisible but still have their function: they take the space and work as it supposed to be (absorb flood/ block the wave), and I can still attack the “sand bags”(it seems just like I’m attacking air).

2. Sea chest looks like a glitch which is as shown in the file.

Hope this can be fixed soon! Thank you!