Win11 transfer to Ubuntu 24.04 Samba, was getting 1Gb/s suddenly caps at 95Mb/s

I set up Ubuntu as a media server for my home, connected via 2.5Gb/s ethernet directly to the router with Cat-8. At first I was getting slow transfer speeds so I did a bit of searching and found the following smb.conf adjustments for [global]. After saving and reloading the service my transfer speeds jumped to 700-1,000Mb/s which was perfect.

At some point in the last couple days my transfer speeds have dropped dramatically, 95Mb/s at maximum. No other configuration changes have been made and I am struggling to find the source of the problem. Does anyone have insights they can share?

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min protocol = SMB2

read raw = Yes

write raw = Yes

socket options = TCP_NODELAY IPTOS_LOWDELAY SO_SNDBUF=131072 SO_RCVBUF=131072

min receivefile size = 16384

use sendfile = true

aio read size = 16384

aio write size = 16384

write cache size = 2097152

min receivefile size = 16384

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