Tendermint version (use tendermint version or git rev-parse --verify HEAD if installed from source):
gaiad 0.24.2-0bf061b7

What happened:
p2p_peers prometheus gauge for a peer does not match the number of peers reported via /net_info RPC (n_peers).

The number reported by p2p_peers is consistently lower than n_peers.

What you expected to happen:
Numbers should match. ;-)

How to reproduce it (as minimally and precisely as possible):
Run gaiad with empty config and use /dial_peers RPC to dial peers.

PEER=nodeid@ip:port
curl -s -G "http://localhost:26657/dial_peers?persistent=false" --data-urlencode "peers=[\"${PEER}\"]"

Logs (paste a small part showing an error (< 10 lines) or link a pastebin, gist, etc. containing more of the log file):

Compare to the below net_info dump from val1.cph1.validator.network:

{
  "jsonrpc": "2.0",
  "id": "",
  "result": {
    "listening": true,
    "listeners": [
      "Listener(@10.255.254.2:26656)"
    ],
    "n_peers": "3",
    "peers": [
   ...

Config (you can paste only the changes you've made):
No changes to default config (empty persistent_peers and seeds).