Problem with render ProRes 50i on MBA M1

Im working in 1080i50 .. Im recording onto Hyperdeck mini , into H264high profile .. Im cutting this records in latest Resolve and exporting prores .. When exports is 50p , everything is fine .. When exporting into 50i , then Resolve getting lot of memory .. Now i was rendered about 1.5 hour video .. Starter on 7.5 GB and swap was zero .. After finish , Resolve have used 35GB ram (25GB in swap) .. When rendering into 50p , resolve have used 7.5GB full time .. Is it any bug ?