Yes, you're not the only one noticing this — Meta and other platforms occasionally update their UI, and features like hover tooltips or breakdown previews can disappear temporarily or be moved.
Here’s what might be happening:
It could be a UI update or test rollout, where Meta is tweaking how breakdowns appear.
Sometimes hover insights are delayed to load or require clicking instead.
If you’re using Ads Manager columns you customized, try switching to a default preset like “Performance and Engagement” — this often restores lost tooltips.
Also, try clearing your cache or using another browser just to rule out a local glitch.