Most imported jpegs are scaled down, but not all!
I have used LR for several years, but never experienced this.
After a holyday trip with two cameras, I copied all files to hdd on my Windows10 PC, and then imported them all (about 6500) to LR in one go.
About 90 % of the photos from one camera (Olymus TG6) is scaled down from 4000x3000 til 2048x1536 in LR.
None av the photos from the other camera is scaled.
If I remove a photo that is scaled, and import it again, it is also scaled again. The original photos on hdd stays of course unscaled.
Tried to set thumbnail to 1:1, without luck.
