CT unloaded frame before complete

[KatieWoe]

3/16/21, some sims in CT showing this issue:

gravity-force-lab-basics : fuzz : unbuilt
https://bayes.colorado.edu/continuous-testing/ct-snapshots/1615854151259/gravity-force-lab-basics/gravity-force-lab-basics_en.html?continuousTest=%7B%22test%22%3A%5B%22gravity-force-lab-basics%22%2C%22fuzz%22%2C%22unbuilt%22%5D%2C%22snapshotName%22%3A%22snapshot-1615854151259%22%2C%22timestamp%22%3A1615862519732%7D&brand=phet&ea&fuzz&memoryLimit=1000
Query: brand=phet&ea&fuzz&memoryLimit=1000
Unloaded frame before complete, window.location probably changed
id: Bayes Chrome
Snapshot from 3/15/2021, 6:22:31 PM

[jonathanolson]

@KatieWoe has this continued to be a problem in the last few days? I'm curious how much trouble it's currently causing (whether it's a constant annoyance, or something that only happens super occasionally).

[KatieWoe]

It mostly seems occasional now

[KatieWoe]

Closing for phetsims/qa#832 as I'm not seeing this in CT right now. If this is in error, feel free to reopen