Swagger editor reports 'should match format "regex"'

[AstenorOfAlembria]

Q&A (please complete the following information)

• OS: Windows 11
• Browser: Chrome
• Version: 125.0.6422.176
• Method of installation: N/A
• Swagger-Editor version: Available release on the web
• Swagger/OpenAPI version: 3.0.3

Content & configuration

Example Swagger/OpenAPI definition:

openapi: 3.0.3
info:
title: Real Estate API
version: 1.0.0
paths:
/realEstateSites:
get:
summary: Get Real Estate Sites
operationId: getRealEstateSites
responses:
'200':
description: OK
content:
application/json:
schema:
type: object
properties:
realEstateSite:
type: object
properties:
timeZone:
$ref: '#/components/schemas/TimeZone'
components:
schemas:
TimeZone:
description: Time zone as declared in the TZ database in the form "Area/Location".
type: string
minLength: 3
maxLength: 44
pattern: '^(?n)((?!Etc/GMT)[A-Z][A-Za-z_]{0,13}/[A-Z][A-Za-z_]{0,13})(/[A-Z][A-Za-z_]{0,13})?|(Etc/GMT[+-]\d{1,2})$'
example: Europe/Paris

Describe the bug you're encountering

Swagger editor does not recognize the valid regex (checked with https://regex101.com/) provided as the 'pattern' of TimeZone

To reproduce...

As soon as I put the YAML in the Swagger editor, it reports

Structural error at components.schemas.TimeZone.pattern
should match format "regex"
format: regex
Jump to line 30

Expected behavior

No error

Screenshots

Additional context or thoughts

It seems the (?n) is not recognized
On the web, I saw that the (?i) is not recognized either

(?n) match the remainder of the pattern with the following effective flags: gmn
n modifier: no capture. All capturing groups () are instead treated as if they were non-capturing groups (?:).
(?i) match the remainder of the pattern with the following effective flags: gmni
i modifier: insensitive. Case insensitive match (ignores case of [a-zA-Z])