On latest experimental live media (as of 2023/06/16), when the cursor is hovered over the taskbar or inside the menu, it flickers.
What says on the tin.
devices where it happens:
Samsung NC110
cpu: Intel Atom N455
00:02.0 VGA compatible controller: Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller
Lenovo IdeaPad S100
00:02.0 VGA compatible controller: Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller
cpu: Intel Atom N455
(these two devices share the same cpu model)
device where it does not happen:
Acer Aspire One D270 26-Ckk
cpu: Intel Atom N2600
00:02.0 VGA compatible controller: Intel Corporation Atom Processor D2xxx/N2xxx Integrated Graphics Controller (rev 0b)
So, it seems to be bound on specific cpus, and not all Atoms.