I have noticed that many items that are identical in my inventory will not stack together, or some will stack and some will not. Helen's token is 1 of these items and i imagine the other hero tokens are the same. some of my zircon will not stack together. Is it designed this way for a reason or is this a bug?

all the new tokens cant stack. i wish they would as they take up too much space. i just trash them

Also, some items separate "bound" and "non-bound" into different stacks.