ebus connection stops working after some uptime

[amichelic]

Have an ebus adapter v5 with ESP32-C3, rev 4. When running it with firmware 20250615, I noticed that it stops reporting ebus data after a while, and the log is filled up with these alternating messages:

20:38:45 Warning ebus: errors: overrun
20:38:45 Info host: history: @-56999 >ec81 2001 >ec81 3998 >ec81 3999 >ec81 2000 >ec81 3999 >ec81 4000 >ec81 1000 >ec81 3999 >ec81 3999 >ec81 2000 >ec81 1000 >ec81 3998 >ec81 4000 >ec81 1000 >ec81 4000 >ec81 3999 >ec81 999 >ec81 1000 >ec81 3999 >ec81
20:38:50 Warning ebus: errors: overrun
20:38:50 Info host: history: @-55999 >ec81 3999 >ec81 2000 >ec81 3999 >ec81 4000 >ec81 1000 >ec81 3999 >ec81 3999 >ec81 2000 >ec81 1000 >ec81 3998 >ec81 4000 >ec81 1000 >ec81 4000 >ec81 3999 >ec81 999 >ec81 1000 >ec81 3999 >ec81 4000 >ec81 1999 >ec81

(and so on, a new pair of messages every 5 seconds). I have never yet seen to beginning of these messages - after a reboot, it works fine for several hours or sometimes even 2 days; but when the problems start, the log quickly fills up, overwriting all old messages.

Firmware 20250415 seems to run fine, most of the time there's only the hourly message about the updated NTP time. Data is reported to ebusd/Home Assistant continuously. I noticed however that it seems to reboot after a few days; have followed the uptime over 2 weeks, and I never saw more than 2-3 days.

What could be going wrong here? Is there any possibility of logging to an external server?