Created attachment 787 [details]
When PV draws analog channels that have samples exceeding the 1000V range, it draws outside of the respective channel's assigned area, drawing *over* the plots of the other channels (see attached screenshot).
1.) Modify libsigrok by changing the demo device's DEFAULT_ANALOG_AMPLITUDE to 2048.
2.) Create a new recording from the demo device in PV.
In this case, PV's autoranging feature goes for a resolution of 20V/div. Manually switching to 1000V/div improves usability, but doesn't solve the problem fully.
FWIW, I used libsigrok 0db1b189bee3ffe5c6ea39d7ca2e62715856b538 (+ modification mentioned above) and PV 136995b831c50d3261143b1183c73af55c9ba3a5.