I've started getting files like this:

15076 [2022-10-19--07:46] .goutputstream-5KNKU1  16046 [2022-10-25--08:03] .goutputstream-35IVU1     23 [2022-10-28--20:18] .goutputstream-C2JDU1

... it only started recently.   The post by 'thesquash' half way down this URL:

https://github.com/mate-desktop/caja/issues/1439

... and a few other things I found say that Geany is known for this, but, as I said, it's only started happening in the last ten days.  What changed?  I do see that the content is indeed files that were copied but why aren't they being deleted?  As the above 'thesquash' points out, these files could be lifesavers in case of an incompleted file write, but mostly they should be deleted, no? My system is experiencing freezes/hangs since I upgraded my OS so that might be part of it but all file copies have been completed just fine.