We have used Replay for many years and sometimes it has been a little buggy but now on our TWO main-computers (one ASUS with i9 and 3080ti plus a 3070ti) we get segment with black recordings on the timeline - they vary from 0.2s to 20 seconds and appear randomly. Our fat production computer is at max 3% CPU and 10% GPU plus we use Resizable BAR.
We really need help with this.

/Gunnar, Sweden

Replay does need a fast drive, and a drive that stays fast after long periods of writing.

I used a Crucial P3 Plus NVME M.2 SSD in a new build. It's claimed 4200MB/s write speed should be plenty for the around 500 Mb/s needed by four channels of replay but it failed. I found that after replay had been recording for something like 30 minutes, the average write speed dropped to around 75MB/s (600Mb/s) with frequent slow points that caused the replays to include black frames. None of the reviews I'd read mentioned this as they hadn't done a long enough write to hit the limit, eventually I found one review that reported it. I replaced it with a different SSD and all has been fine since.

You can keep an eye on the disk write speed in task manager to see if it is slowing down.