Hi Jyothirmai,
I tried to reproduce this issue but it worked well for me.
You can check whether the renamed fields are displayed after uncheck/recheck these fields from edit view.
Or you can publish this InfoPath form to another new library for a test, check whether the renamed fields can be displayed in the new library view all the time. If worked well, you can republished this InfoPath form to your document
library carefully and check the result again.
Thanks
Daniel Yang
TechNet Community Support
