Richtextbox crashes Excel if a Ctrl-C (copy) or a drag and drog is attempted

Question

Windows 11 Pro, 23H2
Richtx32.ocx

• Open at new Workbook
• Create Userform1
• Insert a Richtextbox control

  Sub RTBX()
      With Userform1
        .Richextbox.show 0
      End with
  End Sub

Enter some text

Attempt to Copy/Cut or Drag & Drop some text.

After 10 seconds Excel crashes. No KeyPress or KeyDown event is triggered

Have done both repairs to Office 365