Steps to reproduce:

1. Create a category in the question bank called Q1questions.
2. In that category create two questions, Q1a and Q1b that you can tell apart.
3. Create a quiz where question 1 is a random choice from that category.
4. Ensure the quiz setting "Students may redo another version of any finished question" is on (which requires something like "How questions behave: Immediate feedback".
5. Attempt the quiz as a student.
6. Answer the question and "Check" it.
7. Click the "Try another question like this one"

Expected result: you should now see the other question.

Actual result: it is a 50-50 chance which question you see.