Account invoice and stock picking not connected anymore
I am using Odoo V12 CE and I have a plugin stock_picking_invoice_link which would show the picking on the invoice, but somehow it stopped working. I noticed that entries are not put in anymore into the database in the "account_invoice_stock_picking_rel" table.
Can anyone help me debug this? I don't know where to start looking, I enabled debug in the logs but I don't see anything unusual.