Hello, I'm playing in a survival world in solo on the modpack All The Mod 6, which contain bigger reactor, and every time I log in my world, my reator is empty, even if it was full when i left. In addition, the reactor is also turned of when i join

if you still have the world, can you provide a screenshot of the top of your reactor with F3 open and chunk boundaries shown.

The same with the modpack All The Mods 8 on a Server i hade a 3x3x3 reacktor and when i make it full and go far away. i went back to reacktor and he is empty i put bevor 60 buckets in and it contain no blutonium and no uranium

ich gehe davon aus das der reaktor beim chunk laaden sich automatisch entleert und nichts drinne schpeichert

for ATM8, assuming version 1.0.7 or higher, please create a new issue, there were enough changes between 1.16 and 1.19 that its extremely unlikely that this is the same issue