yep basically this.... if i just spam a key for several seconds, it eventually becomes unusable.
the only way to recover is to exit the game altogether and start over
Also happening to me. extremely annoying issue, so i'll just not play the game until it's fixed.
Playing on Chrome Version 81.0.4044.92 (Official Build) (64-bit)
MacBook Pro (Retina, 13-inch, Early 2015) MAC OS 10.14.6 (18G103)