Denial of service attack on middle relays

I run a cluster of four middle relays, 80 Mbps each on Frontier FiberOptic (ex-AT&T Fiber) in Stamford, CT (1 hour from NYC): https://metrics.torproject.org/rs.html#search/neeltorrelay

I believe middle relays like mine are facing a denial of service attack, presumably targeting onion services. Within minutes of starting my relay it's running at 100% capacity. This isn't normal since whenever I usually restart a relay traffic levels go down considerably. My non-exit relays have the middle flag but not the guard flag.

I initially let the whole 500 Mbps connection be available to Tor but got numerous complaints from family members about "slow wifi" so I reduced it to ~320 Mbps total in order to not interfere with non-Tor traffic.

I use a HPE ProLiant ML110 Gen11 running Rocky Linux 9.4 using EPEL for Tor. My core router is a MikroTik CCR2004-16G-2S+ using a "bypass" setup to use my MT instead of Frontier's Arris router.

For other relay operators, is this an issue?