I am owner of a music channel for my students, recently when I start playing an old message the app says this message doesn't exist (something like this) and then plays it.
But it fears me that maybe my teaching materials get deleted in future because of client bug. (I have access to remove messages as I am the owner and I haven't checked for subscribers because I play them myself for my students in my teachings and don't want them to get forwarded anywhere so I doesn't have a subscriber that won't be admin (my other colleagues are admin and also have remove messages permission)
Please fix this.
Thanks.
=============
Also if it is possible check my old accessibility related complaints here