Thanks for response. Now it seems that it works. Once it happens again I try to reply here ASAP to get correct time-correlation.
I am using OBW, not sure if I will be able to dig any logs from it. I'll try.
Discussion
Sometimes the network graph of LN has old IPs for some nodes. It's problem of v0.15.5 of LND. I hope that v0.16 will resolve this problem (I often moved nodes to other hardware because I am doing now an upgrade of servers hardware)
(correction: I am using SBW)
Sadly SBW is abandoned. I am waiting for it's successor OBW to be on FDroid to upgrade.
Not sure if it uses lnd under the hood.