If any of the HUD's option is active (showBlock or showCount) while the preview is frozen, it will always display the information even if veinmining is not active.

Maybe also add a "(frozen preview)" message or a ❄️ emoji next to the count or block to indicate that the preview is frozen and help the player to remember its state? (in case the first part of this suggestion is applied)

Again, thanks for everything! ^^