Sorry for the inconvenience.
This specific error messages ("Slow operations are prohibited on EDT") are new and are shown in 2021.2 version.
actually they will not look at all those messages, they de-duplicate them
All the reported exceptions will be counted.
Yes, exact same text will be duplicated but if you report 10 same exceptions all of them will be counted.
The more reports the more attention the issue recieves.
Anyway I will redirect this to the platrofm to consider making these specific error messages less flood-ish