Hello Eric,
It was just recently brought to our attention that in some situations the local browser is changing back to a previous folder.
There are many different scenarios that can lead to different results and in our last update a very minor change resulted in an unexpected change in the behavior.
Please try this development build and let me know if this resolves the problem.
https://oss.azurewebsites.net/testr/ffxp-dev.zip
If not please explain your site profile configuration and the steps taken to reproduce the issue. from the site profile we need to know if you have a local and/or remote path set and whether or not the "activate synchronized browsing on connect" is checked, or if synchronized browsing is activated manually after connecting to the server. also please let us know if the connection to the server is lost at any point prior to transferring the file.