is this FreeBSD problem or HP switch

From: Wojciech Puchar <wojtek_at_puchar.net>
Date: Thu, 13 Oct 2022 22:48:03 UTC
i have HP-2530-24G switch in home and 3 VLANs.
there was no traffic on 2 of them, one vlan have full bandwitch traffic 
from computer A to computer B - at 1000Mbit/s
At this time ping from computer C to computer A (computer C have 100Mbit/s 
card) was random between 1 and 1000ms.

Just limiting artifically speed to 950Mbit/s solved the problem.

Is this because switch behaves that way or can it be a FreeBSD problem 
(all computers runs FreeBSD)