Trades are getting rejected due to insufficient fund

From yesterday, option selling trades are getting rejected due to insufficient funds, I have enough collateral for trade to go through but its not getting through.

I see only cash is being considered for the trade. Anyone else facing similar issue?

Not sure if it is due to 50 50 cash collateral ratio, but as per my understanding it is applicable only for overnight positions and not the intraday FnO. I am doing INTRADAY Option Selling trades, still the issue.

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