Not what I ment. Example from yesterday:

I'm in the main window of mitäkuuluu. Contact X sends me 3 new messages, phone vibrates and theres bubble with "3" on his avatar. I open the chat with X, and all I see is the old conversation with him, newest message being the one I sent him much earlier. I ask him to resend messages, so he takes a screenshot of the chat and sends it to me. I start to download the picture, but the download freezes at 80%. I swipe back to the main window and re-enter the chat to try to restart the download. However the picture is gone and the two most recent messages are mine. "Load old conversation" works fine if I want to see messages from earlier like 3 days earlier, but the newest messages are gone.

Understand the issue? Since I really can't use the app as it is at the moment, I'm still wondering if reseting the device and reinstalling everything will solve the issues I'm having with mitäkuuluu at the moment.