Usage of `unevaluatedItems` always results in "must NOT have more than true items"

**What version of Ajv are you using? Does the issue happen if you use the latest version?**

8.10.0 (latest)

**Ajv options object**

```javascript
import Ajv from 'ajv/dist/2019';
const ajv = new Ajv({ allErrors: true });
```

**JSON Schema**

```json
{
"type": "array",
"unevaluatedItems": false,
"allOf": [
{
"contains": {
"type": "object",
"properties": {
"attribute1": {
"const": "A",
},
},
},
},
],
"anyOf": [
{
"contains": {
"type": "object",
"properties": {
"attribute1": {
"const": "B",
},
},
},
},
{
"contains": {
"type": "object",
"properties": {
"attribute1": {
"const": "C",
},
},
},
},
],
}
```

**Sample data**

```json
[
{
"attribute1": "A"
},
{
"attribute1": "B"
},
{
"attribute1": "C"
}
]
```

**Your code**

```javascript
const ajv = new Ajv({ allErrors: true });
const validate = ajv.compile(schema);
validate(json);
```

**Validation result, data AFTER validation, error messages**

```
[
{
"instancePath": "",
"keyword": "unevaluatedItems",
"message": "must NOT have more than true items",
"params": { "limit": true },
"schemaPath": "#/unevaluatedItems"
}
]
```

**What results did you expect?**

Expected this schema to be valid, I was going to go from here to testing the validations when one of the items is not evaluated but as it turns out adding `"unevaluatedItems": false,` generates a hard failure at these lines: https://github.com/ajv-validator/ajv/blob/master/lib/vocabularies/unevaluated/unevaluatedItems.ts#L28-L30

I used https://json-schema.hyperjump.io/ to confirm that this example should work, i.e. is valid in the case I have documented in this ticket and is invalid if we change CONST2 or CONST3 to something else, in other words triggering the unevaluated items clause.

**Are you going to resolve the issue?**

I can try to resolve the issue, would love some guidance first. Maybe I'm confused or misusing the feature or something else.