HPE 5800. LDP: The node is not sending a Address Message in LDP session

[mms101]

Hello.

On my network with some
HPE 5800-24G-SFP with Comware Software, Version 5.20.105, Release 1810P06 there are 2 such devices (device A and device B.  Device A is in the middle of the network and is connected to other devices) with a very strange situation:
 - the IGP (OSPF) is running and Loopback interfaces are available

- the MPLS with LDP is running (the LDP sessions between these devices are present)

- the MPLS with LDP is running on all necessary interfaces on all devices 

- LDP on device A works well with all devices besides device B: The device A doesn't send Address Message to the device B and LSP Count on it is 0. 

Could you please advise where can be the root of this problem?

Thanks a lot!