A short update on this matter:
A potential short term mitigation to reduce to likelihood of the Bridge losing the connection to the Smart Lock is to deactivate any additional integrations via the Bridge API such as Home Assistant or Loxone that would cause (additional / regular) Bluetooth connections to be opened to the Smart Lock. Also, if possible deactivate the Door Sensor.
Those additional Bluetooth connections in rare cases can lead to the Bridge not being able to connect to the Smart Lock anymore.
As previously mentioned our team is working on a solution that we plan to release in the course of next week, once we have it validated to work based on the individual setups reported to us so far.
We are sorry for any inconvenience caused and will provide an update here once available. Thanks.