Block entity_nbt_num_get is not synced between client and server automatically

I'm getting an error on one of my mods that reads "Block entity_nbt_num_get is not synced between client and server automatically, which means it may not work properly in some cases" and I think someone online who downloaded my mod has encountered such an case. Does anyone know how to ensure this is synced between client and server correctly and to prevent the error from showing up (or at least affecting gameplay)?