iPhone lichess app launching from WhatsApp

Hi, I'm sorry if this has been asked before. Previously I've been able to share games with friends by pasting the URL into Whatsapp and then when this was clicked (on iphone) the lichess app would launch to display the game rather than the web-browser version. This was brilliant!

Sadly this has stopped happening. Does anyone know why and if there is a solution.

Many thanks!

Okay, I've had no responses. Please can I ask a simpler question - are there any iphone users for which the Lichess app will currently launch from an URL link in WhatsApp? Or have a way to get from the URL link in WhatsApp to the game in the app, without manually opening the Lichess App and navigating to it yourself?