tested: sending and receiving different file types
File type used: .psd
sent / receive .psd file: Instead of displaying bubble for "data attachments", file is interpreted as "image". The preview of this file changes constantly (is replaced by a random image or video preview of the concerned chat) when opening chat or scrolling through chat history. Detail page indicates correct information about file:
Please check with other data types that might have the same problem. e.g unusual image or movie files. I tested .tiff and .gif, but they are handled properly as images.
version 3.3.30 tested on iPhone6s (iOS 9.2)
tested: sending and receiving different file types
File type used: .psd