Cross-list conversations are missing on some mailing lists

[LinqLover]

Example is this conversation which has been sent to both squeak-dev and vm-dev:

<Mailbird-86ed6f34-65f4-4851-b203-003507ad2baa@hpi.uni-potsdam.de>

https://lists.squeakfoundation.org/archives/list/squeak-dev@lists.squeakfoundation.org/thread/YV6AXZVKPZ3W6DJINBIEREX6C3PQ3MLL/ and https://lists.squeakfoundation.org/archives/list/vm-dev@lists.squeakfoundation.org/thread/YV6AXZVKPZ3W6DJINBIEREX6C3PQ3MLL/

SqhMailmanAggregator class>>#conversationsOn: lists this conversation only one of the lists (squeak-dev in my image). Maybe SqhMailWrapper>>#listName should be plural instead? Or should there be separate wrappers for messages on each list? But how to distinguish them as they are only indexed through their message id? See also the cross-list warning in SqhMailmanAggregator class>>#resetCacheForMailInReplyTo. Not sure about the possible consequences listNames in plural ...