Semantic predicates does not work as expected with left recursion

I have the following grammar:

```antlr
start: rule EOF;
rule: rule suffix | value;
suffix: {!isParentRule(ContextualRuleContext.class)}? 'bar' contextualRule;
contextualRule: rule;
value: 'foo';
```
Where `isParentRule` checks if the current context has a parent context which extends from a given class.

The problem is that an input like `foobarfoobarfoo` always results in "no viable alternative". I expected that whenever the semantic predicate returns false, the immediate parent suffix would match.

Start by reproducing the supplied grammar with the input `foobarfoobarfoo`, focusing on the left-recursive `rule`, `suffix`, and `contextualRule` productions and the `isParentRule` predicate. Trace how the semantic predicate is evaluated during left-recursion handling; done means the input parses as expected when the predicate returns false for the immediate parent suffix.

Written by the indexing model from the issue text.