MaridDB Connection dropped

My HA setup runs in Docker and includes recording to MariaDB. Works fine for many years now. Since last release (can be coincidence) I experienced that HA dropped the DB connection due to a timeout. After restarting the HA container it seams to work again, but after a day or so it occurs again.

Found this error in the DB server log:

[Warning] Aborted connection 36 to db: 'hass_db' user: 'hass' host: ''  (Got an error reading communication packets)

I reinstalled de DB (running MariaDB 10.3) and even started with a brand new fresh DB. Unfortunate it happened again.

AnyOne a suggestion?