more than one Marker are used (2, 3, or 4 Markers)
and stop frequency is higher as 2.14729 GHz
and the Marker is also placed higher as 2.14729 GHz
the displayed value seem incorrect (with negative sign and wrong frequency)
In this setup (more than 1 marker and stop frequency higher than 2.14729 GHz) if stop frequency will changed one or more times, the firmware seems to be instable.
Used firmware: git-20200617-1a9a11d; Jun 19 2020 - 11:21:33
HW: ManoVNA V2_2
It is not a big issue. Only if it helps for you:
If
In this setup (more than 1 marker and stop frequency higher than 2.14729 GHz) if stop frequency will changed one or more times, the firmware seems to be instable.
Used firmware: git-20200617-1a9a11d; Jun 19 2020 - 11:21:33 HW: ManoVNA V2_2