Hallo!!
How about making bedrock really INDESTRUCTIBLE? When we set it on fire, nothing happens to it, when we blow it up, nothing
happens to it, and when we break it with a pickaxe, NOTHING happens to it either! BUT when we throw a bedrock in the form of an object into the lava, fire or cactus, it breaks and disappears!
How to fix it: you can just do it like non-cerite objects, they do not burn in lava or fire! And fix the cactus bug!