"Go To Source" in TXS causes the page in internal viewer to jump sideways.....

[ap0305-thunder]

Environment
TeXstudio 3.0.1 (git 3.0.1)
Using Qt Version 5.12.1, compiled with Qt 5.12.1 R
Win 10
MikTeX 2.9

After carefully fitting size and position of the text in the viewer window,
as soon as I click on the latex source, the viewer moves at the correct position, but it also displaces horizontally going out of center/view.
Please have a look at the video:
https://drive.google.com/file/d/1fDU3QJfqTV1H4UXJ3359RZrO7Mq3iJF5/view?usp=sharing
At t=6s, I click on the structure tab on the left, and the viewer, while moving to about the correct line, also jumps horizontally, going out of center; this is of course annoying because I have to re-center it very often.
I am not sure this is what expected.
Thanks

PS: see also texstudio-org/texstudio#1333