"Collection was modified; enumeration operation may not execute." error on EventBusBase

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Is there an existing issue for this?

• [X] I have searched the existing issues

Description

The same error occurs in https://github.com/aspnetboilerplate/aspnetboilerplate/pull/6805

to https://github.com/abpframework/abp/blob/ac792033d78a7b7644835c866acc2d6a55e5990c/framework/src/Volo.Abp.EventBus/Volo/Abp/EventBus/EventBusBase.cs#L139

Reproduction Steps

No response

Expected behavior

No response

Actual behavior

No response

Regression?

No response

Known Workarounds

No response

Version

6.0.3

User Interface

MVC

Database Provider

EF Core (Default)

Tiered or separate authentication server

None (Default)

Operation System

Windows (Default)

Other information

no