Reproducible in 2.81, 2.82a, 2.83 Alpha, (other versions not tested) for any directional light, if the light is has negative scale in Z-axis.

Steps to reproduce:

1. Add a sun, spot or area light to the scene
2. Scale it -1 on every, or just Z axis
3. Try interactively pointing the light using either Shift+T or the manipulator

@Philipp Oeser (lichtwerk)
for me it works

version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: 375c7dc4caf4, type: Release
build date: 2020-03-12, 15:41:08
Windows 64 bit version.

@Vyacheslav (hitrpr) sure that one has negative scale?

@Philipp Oeser (lichtwerk)
May be sun from initial file had. I can`t say now.
But yes, same jumps for 2.82a with negative scale.