Mail juggling with preview column

1 - Restart in Safe Mode. This will perform a Disk Repair, clear cache files and only load Apple Software, extensions and fonts. The boot up will be slow and can take some time - Normal.

2 - Does the issue present in this mode ?

3 - Sometimes a Safe Boot followed by a Normal Boot will just put things right.

4 - If not - there could be something in the main User Account playing up. To further isolate this - Set up users, guests, and groups on Mac. Then log out of the Main User account and log into the dummy account and test again if the issue persists.

5 - If the issue is present in the dummy account - then, this appears to be a System Wide issue on the computer.

6 - If after performing each of the above steps is the order that have been presents  and still have issues - please advise for possible further assistance.

You are welcome and thank you too 🇨🇦

In first image is how my Mail is configured and only using " Organize by Conversation " is enabled.

In Second Image - with above configuration - all messages received on the Same Conversation are Grouped as One.

But the Little Arrow in circle will expand into all the different individual messages.

Perhaps that is what is the causing the user issue ?

Your system drive is dangerously FULL.

Copy some stuff and clear some space NOW, before you lose data.

Then we can look at the Mail situation.

Seriously, you have less than 1% free, you DON'T want that.

No problems 😀

Perhaps it is time for the below trouble shooting method.

The next best thing for us to having an actual On-Hand experience  with this computer is to follow the steps below

Download the Application Etrecheck directly from a well Respected ASC Contributor. And Safe to use.

The application is free or paid from added features. 

Run the application with Full Disc Access ( Security & Privacy - Full Disc Access ).

It will take a Snap Shot -  both the hardware and software.

 The Report will Not Reveal Any Personal Information. 

Post back the Full Report - copy and paste - using the Additional Text Icon ( 3rd Icon to last )

We can have a look at the report for possible issues and may have possible suggestions to resolve the issues.

Q - Antivirus software: Apple and Avira

There are no known Windows-like Viruses in the wild that self replicate and affect macOS, because of the underling UNIX  Foundation and Permission Limitation. 

The Only thing this Antivirus software is protecting is the Bank Account of the Developers and for zero return to the User aside from the problems this software creates.

The The Built in Security  is all that is required to protect the computer.

Any Third Party Applications that will interfere with the normal operation of the OS, alter, modify, remove or delete or attempt to do so is an invitation for disaster and comprising the Operating System

Should be removed as per Developers Instructions 

Avira would be on the Removal List for sure

This issue may be related to running MacOS Monterey 12.3.1

The current version has now reached version 12.4

It is suggested to keep at least 15%  to 20% of the Drive Total Capacity as Empty Space for good operations of the computer and for additional updates to Monterey to download, expand and install.

Have you played the video? Privacy may be necessary, but all I see is colorful garbage and all I hear is tinkling sounds.