SHIFT key makes health bars dissapear in M+ during combat

[Backupiseasy]

https://www.curseforge.com/wow/addons/tidy-plates-threat-plates/issues/487

• Holding or tapping 'shift' makes all health bars dissapear, but only in M+ during combat!
• This has not been so until several days ago. And I have not installed anything like other nameplates or anything that could interfere with it.
• have tried looking for the problem but could not find it anywhere, its very very confusing!
• KawariDrood
  • Although I know this is an old post - I'm having this same issue which has only just started happening