O365 - OWA Subject line types right > left when forwarding email

[pete]

Bit of a strange one - anyone seen this? Affects two people so far in the same department, working from different accounts. Example at the bottom:

 

• Email with attachment open in OWA on Office 365, using Google Chrome on Win 10 20H2
  
• Attachment contents visible on the left side of the screen, email body on the right.
  
• Person clicks "forward message"
  
• Selects subject line contents and begins to overtype them with more accurate subject
  
• Subject line is typed correctly, just from right > left (etep) rather than left > right (pete)
  
• Selecting reversed subject line contents and typing again works correctly (left > right)
  
• To/CC/ fields unaffected
  
• Message body unaffected
  
• Doesn't always happen
  
• No clear trigger
  
• Display languages set to UK English or US English.
  
• No Chrome extensions installed