Why are invoice numbers skipping in our Brazil Operating Unit?

Invoice numbers are skipping in our Brazil operating unit. The issue started yesterday. There have been no changes at all in the system or the setups. This is a critical issue because we are in violation of a Brazil statutory requriement that invoice numbers should be gapless. Note that we had a similar issue last year. I submitted SR #3-5976893741. We applied patch Patch.10392418, and the version was ARPLBSUB.pls 115.3.15104.3. This resolved the issue at that time. However, the issue started again yesterday. For reference, see attached list of invoices generated yesterday. These invoice numbers are missing:104037
104039
104043
104045
104049
104050
104051
104052
104053
104054
104055
104061
104063
104073
104077
104084
104087
NOTE that I queried for customer_trx_id = 7201024 from ra_customer_trx_all and it did not return any record. It appears that the ra_customer_trx_all is skipping as well