Output of command is returned when calling $?

[JUGI4U]

Please check this sequence of commands:
Get-Process
$?
Get-Process | Format-List *
$?

The first Get-Process and $? work as expected.
But the second call of Get-Process returns an empty response.
However its result (or at least part of it) is returned when calling $? afterwards.

It seems that Format-List * seems to make trouble.
When I start the command with PS_ISE, it works as expected.

BTW: The same applies when replacing $? with $error.

Sample output:

Execute command: Get-Process
Handles NPM(K) PM(K) WS(K) CPU(s) Id SI ProcessName

---

436      22     7708      23476       1,83  12944   1 ABC                                                                          
488      28    30316      34532       3,06  11408   1 XYZ...                                                             

Execute command: $?
True

Execute command: Get-Process | Format-List *

Execute command: $?
Name : ABC
Id : 12944...