Not that I'm aware of. My personal early-production EB3A had two initial firmware updates when I first bought it and then none since-- I just checked last week. It may be that other EB3A's are getting them, but my personal unit is not.
While monitoring with the Bluetti app, in AC UPS mode, battery @ 100% with 140W load, the battery will drop to 99% every 45 minutes.
At that point it draws another 100w from my (grid) solar for about a minute and a clicking sound can be heard in the unit. It then goes back to Grid = AC with battery @ 100. The additional draw from my solar can be seen in PowerWatch software.
Hopefully, it will not repeat again but I wasn't monitoring the solar output when it tripped last night.
The unit gets warm and emits an distinct odor.