Subnet router doesn't work until pinged

Here's my setup:

• PiHole LXC on Proxmox with the following command:

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tailscale up --advertise-routes=192.168.1.0/24,fd7a:115c:a1e0:b1a:0:7:c0a8:100/120 --accept-dns=false

• iPhone

I have also added PiHole's internal IP (192.168.1.52) and Tailscale Ip (100.79.194.104) as global nameservers. Wheneven I connect my phone to tailscale, I am unable to access anything hosted on my internal network. I have those entries added to PiHole's local DNS (both internal IPv4 and Tailscale's IP4over6). They don't work unless I do tailscale ping iphone172 from the PiHole's shell and suddenly it loads. I am unsure how to fix this