More time does not mean better results?

**Description**
I am using LeapHybridCQMSolver to solve the CQM model. If I set the `time_limit` to `None` (which is 5s according to the details of problem status), the solver returns satisfying feasible solutions. However, if I set the `time_limit` to a larger constant such as 30s, the solver cannot find a feasible solution.

**To Reproduce**
I am unsure whether my model causes this kind of result or something from the SDK and solver. Since my model is under business work, I cannot provide it here.

**Expected behavior**
I expected a better result by making the `time_limit` parameter larger, or at least the same result.

**Environment:**
- OS: [macOS 12.4]
- Python version: [3.10]

**Additional context**
I wonder if it is a rare case and mostly comes from the model's structure or if it comes from the internal issue of the hybrid solver.