Strange new behavior using image rotation (L or R)

[Artworksmetal]

I keep my phone camera locked in landscape mode, so photos I take in portrait display sideways. No big deal, I just hit the L key then control S and I'm good to go.
But lately that no longer works. But here's the really odd thing: if I hit the L key twice, putting it in reverse landscape, then control S - Voila! it saves it in portrait mode. I've tested it using the R key, and the same thing happens.
After using the rotate function it saves it 90° off from what it is displaying.
If I use the S (Save as) function and save it with the same or a new file name, it works as expected.
Anyone else have this new interesting feature?

[JendaLinda]

First. I would recommend using the Lossless JPEG Transformation for rotating JPEG images (Shif+J). Regular file save may reduce the picture quality.

I was fed up with photos in incorrect rotation. So in my workflow, I let Lossless JPEG Transformation Autorotate all photos, then I manually fix the incorrect ones using the same tool. I no longer have problems with incorrectly rotated photos.

In IrfanView Thumbnails you can use Lossless JPEG Transformation on all photos in a folder. Just press Ctrl+A to select them all.