[Bug]: fix `isReplaying` in `BaseContext`

### Expected Behavior

`isReplay` returns true or false properly

### Actual Behavior

`isReplay` is not updated to `ExecutionMode` when the context encounters a new operation

### Steps to Reproduce

N/A

### SDK Version

0.6

### Java Version

17

### Is this a regression?

No

### Last Working Version

_No response_

### Additional Context

_No response_