Error parsing peer ID from mdns entry: input isn't valid multihash mdns.go:162

#### Version information:
v0.4.22-0.20190912233308-8c033f124ba8

#### Description:
Very often i see warnings in logs:

```
18:32:37.867 WARNI p2pnode: trying peer info: {12D3KooWBeDGrrTuzbmMSPLre3A6SP5hKgq5dX1dCzrqkS2nvYwK: [/ip4/169.254.109.34/tcp/4001]} discovery.go:23
18:32:39.709 DEBUG mdns: Handling MDNS entry: 192.168.248.136:32498 mdns.go:159
18:32:39.710 WARNI mdns: Error parsing peer ID from mdns entry: input isn't valid multihash mdns.go:162
18:32:39.710 DEBUG mdns: Handling MDNS entry: 192.168.252.200:58640 rpHN=6fcafde5dae1|rpFl=0x20000|rpVr=166.40|rpHA=4c23001494a7|rpAD=1d6a5e16da35|rpHI=e2076a1aa07b|rpBA=45:22:2E:35:3D:FE mdns.go:159
18:32:39.710 WARNI mdns: Error parsing peer ID from mdns entry: input isn't valid multihash mdns.go:162
18:32:39.710 DEBUG mdns: Handling MDNS entry: 192.168.251.220:59669 rpBA=E1:9B:ED:8A:F5:42|rpVr=152.1|rpHI=d8f485cc0258|rpHN=7e75976bcd0c|rpHA=4c97a4ef485c mdns.go:159
18:32:39.710 WARNI mdns: Error parsing peer ID from mdns entry: input isn't valid multihash mdns.go:162
18:32:40.733 DEBUG mdns: Handling MDNS entry: 192.168.248.136:32498 mdns.go:159
18:32:40.733 WARNI mdns: Error parsing peer ID from mdns entry: input isn't valid multihash mdns.go:162
18:32:41.450 DEBUG mdns: Handling MDNS entry: 192.168.248.136:32498 mdns.go:159
18:32:41.450 WARNI mdns: Error parsing peer ID from mdns entry: input isn't valid multihash mdns.go:162
18:32:42.680 DEBUG mdns: Handling MDNS entry: 192.168.248.136:32498 mdns.go:159
18:32:42.680 WARNI mdns: Error parsing peer ID from mdns entry: input isn't valid multihash mdns.go:162
18:32:42.817 DEBUG mdns: mdns query complete mdns.go:146
```

I try to get file from nearest peer.

I run 2 nodes in local network and 1 bootstrap node on remote server (in which i added my file).
In one local node I remove all bootstrap peers , and try to request file. I expect that my node get another local peer by mdns and get addresses of bootstrap peers, and then get file from bootstrap peers. But my request is stuck, and i see many warning in logs like above