When Handy Tooltip is enabled, the tooltip for lockboxes is overwritten, which disallows other addons to write information into the tooltip.

I use addons such as Syndicator, which will count how many lockboxes I have in my inventory, bank etc, but I cannot see this info when Handy Lockpick is enabled.

I just changed method to display bag item tooltip. You should be able to see content added by other addons now.

Works Perfectly, thanks!

Wonderful!
Case closed.