My jenkins version is : Jenkins 2.401.1

I have a github repo : repoA, it has many branches, webhook is setup and has been working for a few years ( spray method)

One jenkins, there job: testJob, it is freestyle project, with GitHub hook trigger for GITScm polling selected,  Source Code Management pointed to this repoA, Branch Specifier is **, it has been working for years.

there was recent jenkins upgrade and plugin upgrade, 

Issue:

I did a change on testBranch1, commit on Github, testJob got poked ( I can see this from log), but the job starts to build all branches, as if the jenkins thinks all branches have been changed. There is only change on 1 branch.

Some debug info

GitHubPollLog shows ** 

Started on Jun 14, 2023, 12:06:18 PM
Started by event from 10.10..⇒ https://..com/github-webhook/ on Wed Jun 14 12:06:18 PDT 2023
Polling SCM changes on jenkins-child-***  <---------this is a jenkins child node
Using strategy: Default
[poll] Last Built Revision: Revision 11b17b64ff29b5f393bd265673c89e24a4c36739 (origin/testBranch1)

I changed the jenkins config for Branch Specifier to be testBranch2, then repeat same steps,

GitHubPollLog shows ** 

Started on Jun 14, 2023, 1:21:01 PM Started by event from 10.10.. ⇒

https://..com/github-webhook/

on Wed Jun 14 13:21:01 PDT 2023 Using strategy: Default [poll] Last Built Revision: Revision 19d6b1e94302eead2020a09f358360887de1b0b8 (origin/testBranch2) The recommended git tool is: NONE

Why when branch is defined as any(**, or blank) Jenkins is Polling SCM changes on jenkins child, it may not have the latest info?