12/30/2024 and still an issue. Keeping this one alive by commenting frequently since my last ticket hit closed without being resolved.
Didn't realize I had, I did the form from my phone.
All entities are still vanishing in 1.18 and now 1.18.2 on nintendo switch when traveling distances or going into the nether. Name tagged ones as well. Even if they are locked into a 1x1 block and unable to move or cross chunk borders. Simulation distance of 4, 6 or 8 chunks does not matter or affect the disappearance in any way. Save and quit also has the same affect on mobs and entities.
I too have 1.17.1 and am on Bedrock with a Nintendo Switch. I can not update to 1.17.2 because that version is not available for the Switch. I have cleared multiple chunks (about 6 pee world) from y=19 to y=0 and found zero diamonds in about 3 different worlds. I had console repaired by Nintendo and lost my pre 1.17 world's and save data. So it is very frustrating to start over in an update that has for me no diamond formation.
Bumping.