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 .