Thanks for the replies and advice!
@millercarbon based on your comment for total lift ~1cm, this may be the problem. I'd say I have approximately half that based on rough measurement. That seems all the more reason why I was thinking the cue lever height should be adjustable. Maybe it has slowly lost damping fluid over time causing it drop in peak height overall?? That might be something I need to investigate with Clearaudio directly.
@imhififan Thanks for the shim advice, that might be a good solution if I can't get the cue lever setup resolved. Just for my knowledge, I can easily understand the "Anti-magnetic" symbol, but what is the second symbol reference?