I have a Xperia phone and Opus cannot reliably transfer files to and from my phone. It causes my PC to freeze and I have to log off and log back on again. Seems like this issue goes back to 2013 or 2017.
As far as we can tell the problems are caused by bugs in Android and Windows rather than Opus.
Using FTP or SFTP instead of MTP is a good alternative on phones that have issues with MTP.