Hub One Event logs corrupted?

[#1]

Whilst investigating yet another drop out. I found that my event logs were missing for about the last 4 months. i.e.first entries are 17 Apr. Yet further down the list, some dated 14 Aug appear.

Any ideas? Time sync issue? 

Attached is my first page of logs. Having thought about it. I did change the "Broadband Firewall" via Member Centre from Off to High, possibly on the 14 Aug

[#2]

Answered my own question. Selected the NTP filter and it's full of failures!

[#3 · Accepted solution]

Changed the broadband firewall to "Low", and this resolved the NTP and event date issue