Ventura 13.0 Apple mail creating blank windows

[will try to give all details] Using Ventura 13.0 on a new M1 iMac [with second screen LG ultrafine], while composing using Mail, suddenly a new window will come up in front which cannot be edited or closed... only minimized. This happens while typing but I don't think I am hitting any spurious keys... happens often... can't tie to anything specific.

Does not seem to be related to second screen [still could be - please help] typing a new email on either screen will create new blank window... always created on the [left] second screen... while the mail app inbox window is located on either screen.

When blank window comes up i am alerted because further keystrokes get an alert sound - meaning the active window is now the blank window which doesn't accept any typing. To continue message i was typing. i minimize blank window or click on my intended active message window to continue.

See attached screen captures

The active surprise blank window has topmost Bar with active buttons :

red/yellow/green radio buttons

red darkens on click but doesn't do anything

yellow minimizes and adds new item each time under Windows menu named 'untitled'

green will go fullscreen and back as usual

The expected addressing lines

To: Cc: Bcc: Subject: From: do NOT appear under the top bar.

Minimized or not, these "untitled" windows stay until i quit the mail application - they do no reappear on startup of Mail.

Super annoying - end up with long list of active background windows in the Windows list and constantly interrupting typing. Would like to avoid these surprise bank windows.

thanks KV

attaching screen captures of blank window, Window menus on left and right. Note Window menu checkmark and no mark line items are different in each case.

Composition window

Blank window