If you try to play regular Virus without Horde mode, it still spawns PvE zombies which are very confusing and clutter the game. I am not sure if this is intended, but considering it is not mentioned in the change notes I think it may be a bug.
Steps to Reproduce
This happened after I queued from the Plaza, and as host changed the mode to Horde. Then, after the game restarted and picked a new map I simply did not change the mode - leaving it on Virus (the default), but the PvE zombies were still spawning. The game otherwise functioned as expected, a random player would be picked to be “infected”, but there was also Horde zombies spawning. Further matches of Virus had the same issue, however I did try changing the mode to Horde and then back to Virus - no change, but bug still occured.
What I expected to happen
I expected no Horde zombies to spawn during regular virus gameplay.
What happened
The game became very confusing due to the copious amounts of zombies cluttering the radar and it became very difficult to evade any infected.