MultipleHiLoPerTableGenerator can contain stale hi value, generate duplicate IDs

An instance of MultipleHiLoPerTableGenerator seems to be created per table (and per schema?). This instance seems to persist across DB sessions/transactions, retaining the "hi" value that it last loaded from the generator table. The problem comes when the generator retains this "hi" value across a DB reset. It is not unusual to reinitialize a schema for a new customer, or to restore a backup dump. The problem is that when a DB is reset, this "hi" value is no longer valid, causing the IDs to wrap around and eventually duplicate. Example sequence:

generate ID 195
generate ID 196

<DB reset.>

generate ID 197
generate ID 198
generate ID 199

<max lo reached. Load new "hi" value from DB.>

generate ID 1
generate ID 2
... (etc) ...
generate ID 196
generate ID 197 (ID is now duplicated, causing NonUniqueObjectException)

Perhaps the generator can recheck the generator table at the beginning of a transaction to ensure its hi value is consistent.