This is about detail panel transforms, it works fine in the world. Dragging the rotation works fine, but dragging location/scale stops updating the values/slider and then it jumps to some value that you couldn’t see. I’m using a pen tablet set to mouse mode (relative cursor location) but it’s the same thing in pen mode (absolute cursor location).
I tested in 4.14 too but there you couldn’t drag location or scale at all (only focus to input values by keyboard) so I’m guessing this is a newer thing.
Thank you for reporting this. As I didn’t have a tablet input device readily available, I tested this on a laptop with a touch screen and the behavior seems to be the same in both cases. I’ll be placing a bug report for this in as soon as I can test it in our latest internal version. I’ll update you here when it has been logged.
I’ve placed a bug report in for this issue which you can find here: UE-44992. As this is low priority issue (doesn’t block development or cause a crash), it may be backlogged but you can keep up to date on its status at the link provided.