After further consideration, it seems as though there were too many factors in this bug report to definitively identify what went wrong. Furthermore, we were unable to replicate this issue on the final release of Ubuntu 20.04 LTS.
This error also appears to have occurred before the final version of all components of GNOME 3.36 had landed in the repositories, so it's hard to say where the blame is. As such, this bug will be marked "invalid" as it occurred in an unsupported setup at the time.
After further consideration, it seems as though there were too many factors in this bug report to definitively identify what went wrong. Furthermore, we were unable to replicate this issue on the final release of Ubuntu 20.04 LTS.
This error also appears to have occurred before the final version of all components of GNOME 3.36 had landed in the repositories, so it's hard to say where the blame is. As such, this bug will be marked "invalid" as it occurred in an unsupported setup at the time.