In EWT, according to the "rule of alternation", wave 2 and wave 4 will each take a different form.
One more thing to consider:
Wave 4 usually retraces 38.2% of Wave 3, but once in a blue moon has been observed to hit 50% of Wave 3. In the current scene it has already retraced almost 78.6% of Wave 3 and is still in 5-wave mode.
Possible? Hey, who knows, this is an unusual BEAR scene but I know this from deep inside ........... BEAR will not denigrate its own Master Commander (Wave 3) thusly by abrogating Wave 3's umph. No Sir., BEAR will not allow such demolalization of its supreme commander, the one who contains the "recognition wave as its 3rd of 3rd"





