id summary reporter owner description type status priority component resolution keywords cc component_version os os_version 12053 FileZilla client GUI acting as if single threaded Stuart Altman This started happening over 6-12 months ago. I assumed the complaints would be so rampant that it would be fixed immediately ... I was wrong. REPRO: (1) Initiate a very large file upload. (2) Change local site location in preparation for another upload. (3) BUG: Client freezes for over a minute. There are many other scenarios, but this is the easiest to replicate. FZ client is running on Windows 10. FZ client version is 3.46.0 (but, again, this has been broken for a LONG TIME). Bug report new normal FileZilla Client GUI freezes, single threaded, poor performance Windows Windows 10