Oh my! That's pretty bizarre ladylion_23. Are the messages only deleting from only certain threads? Are you getting any memory error messages or using a 3rd party message app? I think you could be on to something with the amount of threads you have. The phone could be clearing some memory if the storage space is getting too low. Please reply back and keep us posted on this. Thanks!
Thank you for responding. My messages are only deleting from the
conversation I use the most. I only have 4 conversations going on and use
the other 3 rarely. I haven't got any memory error messages and am not
using a third party app.