Minimal viable example:
https://github.com/ericdriggs/karate-multi-threaded-access-bug

Versions effected: 1.3.0, 1.4.0.RC1

Versions not effected: 1.2.0

Steps to reproduce:

• karate 1.3.0
• java 11
• define Java.type and java functions in karate-config.js using karate.callSingle
• multi-threaded access to javascript function

Mitigations:

• use karate 1.2.0 or 1.4.0.RC1
• use karate.call instead of karate.callOnce

Test machine:

• Mac m1