I am having issues with a problem where if I run a test as a custom test in the editor, it gets accepted with runtimes of 200-300 ms. However, when I make a submission the same test case exceeds time limit. Could it mean that there are different time limits when run as a custom test vs that in the submission? What is typically the run time limit of C++ submissions?

Details:
https://leetcode.com/problems/check-if-an-original-string-exists-given-two-encoded-strings/discuss/1564138/HELP!-Test-case-passes-as-a-custom-test-case-but-exceeds-time-limit-on-submission