I have a Proxmox server with Hetzner, with a ip range 123.123.123.112/28 (.112-.127, 16 hosts, .112 = gateway, 127= broadcast)
The host has two bridges, vmbr0 with CIDR 123.123.123.112/28 and vmbr1 with CIDR 10.10.10.1/24.
On this server I have a number of virtual machines that all work fine...