Hi Agrajag,
The Inkscape project has a brand new forum that just has opened on the Inkscape website:
https://inkscape.org/forums/ For any future problems, would you please post your message over there? This forum will eventually be closed. (The new one just opened last night.) It will be all the same people, just in a different forum.
Well, if you didn't say these were new documents, I would be tempted to think you're seeing a performance issue. But if they're blank, or nearly so, performance would not explain it. Well, unless you have something like 10 documents open at the same time....which seems unlikely.
It sounds like the kind of problem that if I looked at one of your files which is having this problem, I would not see it. It sounds like it would be local to you. But I can't think of anything else to try, except to look at the file.
Of course you're certainly welcome to share the file. But maybe someone else has an idea?