low fps in single channel

Hi everyone,
My current setup:

i5-10600KF
RTX 3050 8GB
16GB DDR4 2400MHz (currently running in Single Channel)
Windows 10 / latest drivers

In Battlefield 6 (beta), I’ve noticed something strange — at the start of a match my FPS is around 80, but it quickly drops to 45–55. At the same time:

CPU usage is at 100%
GPU usage ~60%
Others with almost identical setups (but running Dual Channel) in benchmarks get a steady 80–90 FPS.

Question:
Is it really possible that running in single channel RAM is cutting my FPS in half in BF6? Or could there be another issue at play here?