When select repositories in "Branch resources", the only first 30 results shows up

By analyzing the request "http://jenkins.homes/job/xxx/job/xxx/descriptorByName/org.jenkinsci.plugin.gitea.GiteaSCMSource/fillRepositoryItems", it returns only 30 repos, contains both public and private, but the rest ones are not showing.

INFO:
Gitea Version: 1.16.0+dev-488-g0e189eeca
Gitea Plugin: 1.4.0--rc182.9eb947470fcf
"duchenpaul" is a user name