Can't select files with the "rectangle"

Hi!
Now I have got that weird behavior again that I can't click the left mouse button on a row and drag to select many files (rectangle).
When I do it, it will only select the file I click on.
I can of course go below all the files and click and drag upwards.
I'm pretty sure this behavior will go away if I restart WinSCP, but something happens after WinSCP has been running for some days (it has now been running for 21 days).
Yes, I restarted WinSCP and now I can select files again with the mouse (rectangle).
WinSCP 6.3.4
Windows 10 22H2

I think I have already reported this to you, but I couldn't find it.
Maybe it was in an email only, I'm not sure.

Can you try to find out after what operation/event does the problem start?

Sorry, but I have no idea when it started to happen. My computer has been running for more than three weeks and so have WinSCP.

Now it has happening again, can't select files and when this happens I can't paste to the window because the file will get selected and show the wrong context menu. "Paste from Clipboard" will not show up when I right click in the window. A restart of WinSCP will resolve the issue, but something is wrong because it shouldn't be like this.

WinSCP has now be running since 2025-11-26. The only way to reproduce the issue is to use WinSCP for an extended period without restarting it.

I'm running WinSCP 6.5.5

Thanks for the report. Next time it happens, can you check WinSCP memory consuption?

It’s happened again, and this time it only took four days (start time 2026-01-26 17:36:59).
I have attached the memory usage of WinSCP.

What more can I do to help you identify the problem?