The Modbus Binding is polling the data from several devices every 5s. This works as expected and I see the updates every 5s in the logfile.
I’m using the JDBC MariaDB Binding as Persistence, but there are gaps of around 45s in the Database. With 2.5.12 everything has worked es expected. It like its working for a few seconds and there’s no more update in the database.
Looking at stored database entries you seem to have duplicated values, even if your modbus poller did nit report them. There might be a small time shift between log and database, but values should be more or less consistent.
I suppose that you might be having multiple inserts but item state is not updated yet or seen by persistence service (for some reason), effectively you get same state two or three times.