Just a note that I’m also getting webGL errors (CONTEXT_LOST_WEBGL: loseContext: context lost), that result in texts not rendering. I’m playing rather big (i.e. long) audio files, that play ok even after losing context, but no texts are visibile until a new audio file is loaded.
Changing the size of the window makes the components reappear. Which is nice, but not really optimal, as I would prefer subjects to be immersed in the task and remain in full screen throughout the experiment. (Thanks fot the tip though @kristenk!!)
Happily for me this doesn’t prevent running the experiment and gathering data, but of course it would be nice to have things run smoothly for the participants. 
Running macOS 10.14.6 (2.6 GHz Intel Core i5, 8 GB 1600 MHz DDR3, Intel Iris 1536 MB) and Chrome 83.0.4103.116.