Hey,
i am using the Replay Mod in 1.8 and there is this bug in Minecraft 1.8 in which beacons disapper. Here is the link to the official Minecraft Bug report :https://bugs.mojang.com/browse/MC-68247. Could you please either fix this in the mod or just simply code an additional mod that you can add to your mods folder. Or update the mod to 1.8.x, sice the bug is already fixed in this version. I know this gets requested often but I figured you dont really want to update it to 1.8.x. And if there is another way to fix this please let me know, it tis really annoying me at the moment.
Thanks