[BUG] Issues with adding AAD users and groups to SharePoint Online site groups using PnP.PowerShell

[a4550]

Issues with adding AAD users and groups to SharePoint Online site groups using PnP.PowerShell

for example, we have created new site
https://dummy01.sharepoint.com/sites/test1

then we run the following commands:
*guids and names are replaced in this sample with pseudo

===

$siteUrl = "https://dummy01.sharepoint.com/sites/test1"


$users = @("c:0t.c|tenant|2c078754-9ca3-49b6-82ac-ef717f929c2e", "c:0t.c|tenant|365b3df3-0a1f-4f7d-a355-dd563c61218a", "user1@org.com", "user2@org.com", "user3@org.com", "user4@org.com")

Connect-PnPOnline -Url $siteUrl -Credentials $SPOcredentials 
$Group = Get-PnPGroup -AssociatedOwnerGroup
$users | % {Add-PnPGroupMember -LoginName $_ -Group $Group.id}

===

Results:
1st run - added 3 principals out of 6 to SPO Owners group - 2 AAD groups and user2

then using browser we navigated to the site and removed these AAD groups and user2 from SPO group, re-run the script

2nd run - added 2 principals out of 6 to SPO Owners group - user3 and user4

then using browser we navigated to the site we removed user3 and user4 from SPO group, re-run the script again

1st run - added 4 principals out of 6 to the SPO Owners group - 2 AAD groups, user1 and user2

in addition, we have tested it with different AAD group types: Security and M365 groups - the same issues here
"c:0t.c|tenant|group_guid"
"c:0o.c|federateddirectoryclaimprovider|group_guid"

initially we were using the latest version PnP.PowerShell version 2.1.1 by calling "Add-PnPGroupMember"
but later we checked PnP.PowerShell version 1.12.0 as well by using "Add-PnPUserToGroup" - the same issue here

please advise, thank you!