We've recently done a lot of work (https://github.com/matrix-org/matrix-rust-sdk/issues/3544) on making sure that we keep records of the device sending a megolm session. (To recap: the main driver of this was to reduce the number of "sent by a deleted device" warnings, so that, in future, we can treat such warnings as a decryption error).
We believe that is all now working and wired up -- however, it would be good to add some application-level tests that it is working correctly, both today and in future.
We've recently done a lot of work (https://github.com/matrix-org/matrix-rust-sdk/issues/3544) on making sure that we keep records of the device sending a megolm session. (To recap: the main driver of this was to reduce the number of "sent by a deleted device" warnings, so that, in future, we can treat such warnings as a decryption error).
We believe that is all now working and wired up -- however, it would be good to add some application-level tests that it is working correctly, both today and in future.