Holding ctrl+LeftArrow in text edit box in chat causes text cursor to loop back to end of line.
Confirmed this issue with coworkers, and also confirmed that it did not occur on previous versions.
Cursor looping issue does not occur in the opposite direction(holding ctrl+RightArrow)
Also occurs on Mac using CMD+LeftArrow.
Just to say, this is inconsistent behaviour with the vast majority of Windows applications (to be fair, I haven't seen one that has this behaviour), and massively frustrating if your muscle memory relies on a hard stop when using CTRL. Simple bug to fix, maybe?