I am currently using:

PowerShell 7.2.1
PSReadLine 2.2.2 (with PredictionViewStyle ListView, if it matters)
Cmder 1.3.19
oh-my-posh 7.23.0 (if it matters)

I can use the F1 shortcut to get the paged help and everything works as it should until I quit the pager with Q.

Then I am returned to a cleared screen.

There seems to be some unwanted interaction between Pager and ConEmu.

I tested in other terminals besides Cmder:
ConEmu => same result (no wonder as Cmder is basically ConEmu+)
Plain console host (pwsh) => works as expected
Windows Terminal => works as expected

Any idea what is going on and if it can be fixed by Pager or ConEmu?