Ref.: #34159, #341607
Details [2025-06-18]:
We have received several reports from users experiencing issues with their Balance 20x devices becoming unstable, mostly showing rebooting or freezing after updating to the 8.5.2 GA firmware.
Upon investigation and extensive tests in the lab, we noticed that the lab unit exhibits the symptom when a high volume of traffic is passing through.
We have prepared a special firmware (8.5.2s067) to mitigate the issue. The fix will be included in the next GA release.
Affected firmware version:
8.5.2 GA
Affected models:
Balance 20X
Fixed in firmware version:
8.5.2s067
Download link: here.
Workaround:
Optionally, you can downgrade to the previous firmware version, eg. 8.5.1 or earlier.
Additional Notes:
This special firmware is based on 8.5.2s051, which is originally prepared to fix this B20X unexpected crash issue. Also, added the fixes in 8.5.2s042, that fixed the known issue described in this article.
Users who are running either 8.5.2s026, 8.5.2s042, or 8.5.2s051, should consider upgrading to this special firmware.