I started using LR just a few months ago and up until last weekend LR recognised all three lenses. Sunday I suddenly noticed that it no longer recognised the Sigma. In fact I cannot even manually select the sigma. According to LR is doesn't exist. This morning I used the 16 - 35mm and noticed LR doesn't recognise this one either although it still recognises the 24mm. prime. No updates have been applied in the last week or so!
I was about to reply that I only ever shoot in RAW so no. But, you are the second person to ask that this afternoon so I thought that I would check. Somehow without realising I have changed my setting to jpeg.
I now embarressingly crawl back under my stone with humility and a million thank you's