Bug reports without an attached log file are usually useless.
I've sent you the email to conduct tests
Re: Bug - 5.13 GUI freezes while browsing in SFTP
Thanks for your report.
Can you send me an email, so I can send you back a debug version of WinSCP to track the problem? Please include link back to this topic in your email. Also note in this topic that you have sent the email. Thanks.
v 5.13 8172
Just after update to this version the GUI started to freeze while browsing in SFTP-3. While the first session is not reacting I can still right click on the taskbar and reopen a session in the new window. This new session works forever while the first one is not responding. The only method to close the first window is to use the task manager.
It is 100% repeatable but cannot identyfy the exact moment so it is nor replicable. To be frank it always freezes in a random moment in the first 5 minutes of browsing. It happens before transferring any files. In this version GUI also displays (refreshes) the local folder very slowly comparing to the previews version so the bug could be there not in the remote connection. Just a guess.
Windows 10 in Polish version, Polish version of WinSCP.