Page loads with Playwright, but fails with scrapy-playwright

Question

TL,DR;

When page is loaded by headless playwright + proxy it works perfectly, every time. When page is loaded by scrapy-playwright, also headless and same proxy, it raises Timeout errors and the HTML content of the page object is as JS was disabled. Other domains work with scrapy-playwright without a problem.

Intro

I'm trying to load the page below with scrapy-playwright, however and it keeps raising TimeOut exceptions. So I wrote a MRE in Playwright and it successfully loads the page.

If I check the content of the page when the timeout is raised, I get the HTML of a page that is not getting rendered at all, asking to enable JS:

Just to highlight from the HTML above:

Page (example): https://wbmason.com/ProductDetail.aspx?ItemDesc=Green-Mountain-Coffee-Breakfast-Blend-Coffee-K-Cup-Pods-24-BX&ItemID=GMT6520&uom=BX&COID=&SearchID=907879066&ii=1
I'm using proxy.
No change if using headful browser.
Same playwright installation is used, as its the only one installed.
scrapy-playwright is properly installed, with it's download handlers and etc. Other pages from other netlocs work with no problem.
I have reduced PLAYWRIGHT_MAX_PAGES_PER_CONTEXT and PLAYWRIGHT_MAX_CONTEXTS to 1 in order to debug, no improvement.

Exceptions:

playwright._impl._errors.TimeoutError: Page.wait_for_selector: Timeout 30000ms exceeded.
Call log:
waiting for locator("#ctl00_ContentPlaceholder1_ucProductDetail_fvProductDetail_lblSellPrice") to be visible

and

playwright._impl._errors.TimeoutError: Page.goto: Timeout 90000ms exceeded.
Call log:
navigating to "https://wbmason.com/ProductDetail.aspx?ItemDesc=Green-Mountain-Coffee-Breakfast-Blend-Coffee-K-Cup-Pods-24-BX&ItemID=GMT6520&uom=BX&COID=&SearchID=907879066&ii=1", waiting until "networkidle"

Scrapy-Playwright spider (Doesn't work)

class ExampleSpider(Spider):
    custom_settings = {
        "DOWNLOAD_HANDLERS": {
            "http": "scrapy_playwright.handler.ScrapyPlaywrightDownloadHandler",
            "https": "scrapy_playwright.handler.ScrapyPlaywrightDownloadHandler",
        },
        "HTTPPROXY_ENABLED": False,
        "PLAYWRIGHT_LAUNCH_OPTIONS": {
            "headless": True,
            "proxy":{
                "server": SERVER,
                "username": USERNAME,
                "password": PASSWORD
            },
        },
        "PLAYWRIGHT_BROWSER_TYPE": "firefox",
        "PLAYWRIGHT_DEFAULT_NAVIGATION_TIMEOUT": 90_000,  # Seconds
        "PLAYWRIGHT_MAX_PAGES_PER_CONTEXT": 1,
        "PLAYWRIGHT_MAX_CONTEXTS": 1,
    }
    start_urls = ["https://wbmason.com/ProductDetail.aspx?ItemDesc=Green-Mountain-Coffee-Breakfast-Blend-Coffee-K-Cup-Pods-24-BX&ItemID=GMT6520&uom=BX&COID=&SearchID=907879066&ii=1"]
    
    def start_requests(self):
        for url in self.start_urls:
            yield Request(
                url,
                dont_filter=True,
                meta={
                    "playwright": True,
                    "playwright_page_methods": [
                        # PageMethod("wait_for_timeout", 5000),  # This also didn't help
                        PageMethod("wait_for_selector", "#ctl00_ContentPlaceholder1_ucProductDetail_fvProductDetail_lblSellPrice"),
                    ],
                    "playwright_page_goto_kwargs": {
                        "wait_until": "networkidle",
                    },
                    # "playwright_include_page": True, # This also didn't help
                }
            )

Playwright MRE (WORKS)

async with async_playwright() as p:
    url = "ttps://wbmason.com/ProductDetail.aspx?ItemDesc=Green-Mountain-Coffee-Breakfast-Blend-Coffee-K-Cup-Pods-24-BX&ItemID=GMT6520&uom=BX&COID=&SearchID=907879066&ii=1"
    browser = await p.firefox.launch(
        headless=True,
        proxy={
            "server": SERVER,
            "username": USERNAME,
            "password": PASSWORD
        },
    )
    page = await browser.new_page()
    await page.goto(url, wait_until="networkidle")
    await page.wait_for_selector("#ctl00_ContentPlaceholder1_ucProductDetail_fvProductDetail_lblSellPrice")
    content = await page.content()
    with open("content.html", "w") as f:
        f.write(content)

The problem I'm trying to solve is, obviously, how load the page with scrapy-playwright. However, I'd love to know how is this different from the playwright solo approach that works in the first try.