block nbt is not working!

Hello, i have a problem with nbt tags for block, when i set nbt number tag in procedure and get number tag in another procedure ( allow dispay image on gui of this block) its not working, but another procedure block is working. how i can to fix it? I'm sure everything else is correct because if I change the nbt block tag to a global variable then everything works but for all the same blocks.thx for help.version of mcreator 2021.1 and 1.16.5