I have encountered the following problem with a blockchain (Multichain releases 24 and 25) set up on a number of Fedora VirtualBox guests:
If a node of a chain issues/receives any assets while the VB guest hosting node has NAT and Host-Only adapters enabled and then it switches to Host-Only and Bridged adapters enabled, all the assets held in its wallets appear to be wiped (checked using gettotalbalances and getmultibalances). However, if the guest switches from NAT and Host-Only adapters to a Bridged adapter, the problem does not occur.
Have you seen something similar before?
Best wishes!