After gitea update (version 1.14.0+dev-707-g66a148e39) pipelines for multiple branches/commits don't work at all (hooks are being sent though): commit doesnt't start new pipeline, new branches do not appear in jenkins automatically.
For some branches hooks still work.
Looks like gitea has limits for branches, for which hooks work.
We downgraded gitea to version 1.14.0+dev-514-gd2ee1221c and hooks work well again.

there is nothing interesting in gitea logs, though trace log level is being used.
In project settings i can see that hook was successfully sent and 200 code was returned.
No pipeline started though when i push new branch. But when i create new pull request from this branch, jenkins job starts successfully.
with previous gitea version everything worked well: both branch and pull request hooks started a new job. And we didn't update anything else except gitea. In jenkins logs there are also no errors.