When working in the SQL query window in pgAdmin, keeping it open for the whole day, I sometimes notice that it will randomly tell me that I have a syntax error somewhere in it when I run it, without having changed anything. If I just click somewhere else inside the window, such as placing the marker in the end of the query, and execute it again, it will run. So without any actual changes, it runs/doesn't run.
Is this known? Why does it happen? How can it be possible? And so on.
(No, I cannot reliably reproduce this. I don't even know when it happens. I just know it does happen, and has happened for many versions of pgAdmin over the years.)