I think you are using the free version of proton vpn.
With proton vpn you have to pay to use BitTorrent or other p2p stuff. It’s how they fund the free tier.
It could also be your ISP blocking torrent traffic.
You could try using quad9 dns and enable DNS over HTTPS on your system and do DDL.
There is also ECH (very hard to get working) but is amazing at bypassing content blocks.
Edit: unlikely that you would want to take the time to set it up but DNScrypt is amazing especially when you have annoying captive portals at a coffee shop. Requires some setup before you try to bypass.