Same or similar issue in 1.13. Newly installed server.
[media][media][media][media]This one was driving me crazy for a while yesterday- hopefully we can get it some attention!
It is certainly the act of hopping the potions out of the brewing stand that "jams" each individual bottle slot. Breaking and replacing the stand, as well as removing a potion from each slot manually will clear it up, but as soon as a potion is removed from a slot in the brewing stand via hopper, that slot "jams" and won't accept a new water bottle by hopper. I can also add that the bug is NOT in 1.11, but does show up in 1.11.1 and 1.11.2
Same issue on server 1.13.1 when trying to reuse the same world files in previous post. No problem however with new world files with a reinstall. Apologies if this description is not technical and specific (I don't play the game but host a server for my kids). Problem was described to me as "I walk too far from the spawn which causes the crash." After a server reboot, ""when I log back in it tries to spawn in the same place but it doesn't load the land again." Ultimately someone else in the game will cause the server to crash again for the same reason.