CDP Mode: Walmart scraper detection rate increased from 10% to 90% - seeking advice

[pipo-x]

My Walmart scraper using CDP Mode worked reliably (10% captcha rate) but now gets blocked 90% of the time, even with residential proxies. Looking for guidance on what changed or what I'm missing.

Environment
SeleniumBase version: [your version - run pip show seleniumbase]
Deployment: GitHub Actions (Ubuntu runner)
Mode: CDP Mode (sb.activate_cdp_mode())
Proxies: Webshare residential (tested with/without - same failure rate)
Browser: Chrome (UC mode enabled)

Code Structure
Based on SeleniumBase examples (walmart examples in particular):

with SB(uc=True, test=True, ad_block=True, proxy=proxy) as sb:
sb.activate_cdp_mode("https://www.walmart.com/")
sb.sleep(2.8)

# Handle captcha if detected
if sb.is_element_visible("#px-captcha"):
    sb.cdp.gui_click_and_hold("#px-captcha", 7.2)
    sb.sleep(4.2)

# Remove ads
sb.cdp.remove_elements('[data-testid="skyline-ad"]')
sb.cdp.remove_elements('[data-testid="sba-container"]')

# Search flow
sb.cdp.click('input[aria-label="Search"]')
sb.cdp.press_keys('input[aria-label="Search"]', query + "\n")
sb.sleep(3.8)

# Extract product links...

-----What Changed
Before (2-3 months ago): ~10% captcha rate, scraper ran successfully
Now: ~90% captcha rate (PerimeterX #px-captcha)
Observation: Same code, same approach, drastically different results

What I've Tried
✅ Residential proxies (Webshare) - no improvement
✅ Longer and random sleep timings (3-7 seconds) - no improvement
✅ Running locally vs GitHub Actions - locally works way better than github actions (I get a captcha sometimes (way less than 20%) and its mostly after clicking the search button ... while on github actions . i get it right after opening the first page)
✅ gui_click_and_hold() for captcha (from examples) - works when captcha appears, but appears too often
✅ Removing detection scripts (skyline-ad, sba-container)

I am still a learner and trying to add this scraper to a pipeline I am building . if the IP ranges of github actions is getting flagged or something . I dont mind if you guys could point to any other alternatives (even paid ones (: )
thank you guys . and special thanks to mdmintz .

[pipo-x]

I am really stuck in here ... if anyone got anything to help me with or guide me ... i'd be super thankful ...
Also if you need any further context or details just let me know and i'll provide you with as much as needed .