Hover over icon on panel the info popup flashes:
Huh, I wonder if thats because of your cursor. Can you try with the standard breeze cursor?
Somebody else (on EndeavourOS forum) has this and is on the standard cursor:
Yet another victim of 494193 – Panel popups position broken when PlasmaCore.Types.NoBackground is applied to the panel MR that may fix this: PanelView: Fix popups position when NoBackground hint is set (!4797) · Merge requests · Plasma / Plasma Workspace · GitLab if merged.
Explanation here [BUG REPORT] Plasma 6.2 applet panes stop to dodge panel