After performing an authority search by "Personal name", we have noticed that search results aren't sorted in alphabetical order after page 51. 1) Go to Authority search (click on "More" and select "Authorities" on the top left corner) 2) Select "Personal Name" in the Default Menu. Leave the search box empty and submit. 3) Assess the first 50 pages of results (all results are sorted alphabetically) 4) Access page 51 and notice the different pattern of results ( results aren’t sorted in alphabetical order).
I think this might be related to a setting in Zebra - a limit on how many records are sorted.
Indeed, it is a performance limit of Zebra [U+1F993] , option "sortmax". You can see it is defined in biblios config : https://git.koha-community.org/Koha-community/Koha/src/commit/f096a8dffcb35c153c3f4f27ce5767b1c7fb3f75/etc/zebradb/zebra-biblios-dom.cfg#L53 So for authorities the limit is at default value 1000. Be careful on performance and temporary disk space impact when increasing this value. Best regads,