Items & player invisible except for one arm

I just logged into my server through Aternos using the latest Snapshot and all items are invisible in my inventory… My character is invisible except for one arm… Also, several items around my base are invisible, like beds and picture frames. I can still use them. I just can’t see them. There also appears to be something floating underneath the amputated arm, that moves as I walk… I just tried to use an item and the amputated arm switched places with the image that was floating behind it. It appears to be a glitched out image of all the different inventory items and it switches out images as I scroll through my items on my control bar.

All I did was log in and find things this way. I tried restarting my Minecraft player and restarting my server, but nothing changed. Is this a known bug, or something unique to my account?