Sign Glitch

My friend and I sometimes try to write on a sign but either, it has lots of hashtags all over it and it overlaps the sign, or, the sign just shows as blank. This is definitely a bug as it happens with everyone I know. This is on bedrock edition. Please fix this bug as it is really annoying! It only happens random blocks in any world or realm. It works normally on some blocks. 

Thanks,
Emery