Sony A7S3 XAVC S-I clips

Sony A7S3 XAVC S-I clips cause more and more memory to be used up for each one that starts to play on the timeline. It makes no difference as to the duration of the various clips, it's simply the number of them on the timeline and with more than a couple of dozen even very short clips memory usage increases in steps until the limit set in Resolve preferences is reached.

I can edit and grade them without problem, except that due to this memory loss, before exporting with the Nvidia encoder I must first close and re-open the project to recover this memory otherwise a render only goes at half normal speed.

This problem occurs only with XAVC S-I 10 Bit 4:2:2 footage from this camera. I don't experience it with any other camera's 10 Bit 4:2:2 footage, such as from a Panasonic GH6.

Has anyone any thoughts on this?

This might be the same problem me and other are also experiencing:

viewtopic.php?f=21&t=188567
viewtopic.php?f=21&t=188218

It seems that H265 422 files trigger insane memory loads either through viewing files in your bin or timeline. There seems to be no fix so far.

It does look to be a similar problem, including memory use increasing when I hover scrub through bin clips.

Except in my case, I don't have Intel Quick sync and my clips are H.264 10 bit 4:2:2 not H.265.

My latest thoughts are it might be Intel CPU related since the same clips sent to a friend don't trigger the problem in latest Resolve on his AMD Threadripper machine.