Investing in Indian market while hedging using USD/INR future contracts. What can go wrong?

I invest mostly in US and some part in Indian market. I am an Indian national so I understand the Indian market very well too.

I invest mostly in Nifty 50 which is broad index for top 50 largest Indian companies.

While making investment, I want to assume no foreign exchange rate risk.

So I always buy USD/INR future contracts equivalent to my current portfolio size and rollover them on expiry (usually once a year).

1 year USD/INR future contract is 2% more expensive than spot price. I feel it's worth it considering the historical out-performance of the index?

Is there anything I should worry related to foreign exchange risk that I might be missing?