Metrics: no graph shown

using 4.5.1-2844 Community Edition (build-2844), from one day to another I cannot see bucket graphs anymore:

before it looked like this:

this is the error that I have in the logs:

Client-side error-report for user undefined on node 'ns_1@couchbase-0.dbms-prod.svc.cluster.local':
User-Agent:Mozilla/5.0 (X11; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0
Got unhandled javascript error:
name: Error;
message: [ngRepeat:dupes] 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hide 	menelaus_web 102 	ns_1@couchbase-0.dbms-prod.svc.cluster.local 	1:59:39 PM Wed May 17, 2017

Hi @rashtao,

Is this intermittent, or are you permanently unable to see graphs anymore? I’ve tried it locally: I see the graphs and I don’t see that JavaScript error. What operating system / browser are you using? Is there any information in the Log that might be relevant?

It is permanent.
It happens only for one bucket (for the other buckets all the graphs are shown).
It is on a couchbase cluster of 3 nodes.
If I select one specific node from the upper right drop down menu, graphs are shown correctly (related to that node), while “All Server Nodes” graphs are not.
It happens both on Chrome and Firefox, on linux os.
In the logs I only have the log error I posted, it is printed every time I refresh the bucket page.

Thanks for your help!