WAF rule with low and upper letters 2

Why was the Linkedin’s bot blocked?

Changed to

(lower(http.user_agent) contains "bot" and not lower(http.user_agent) contains "google" and not lower(http.user_agent) contains "bing" and not lower(http.user_agent) contains "vkrobot" and not lower(http.user_agent) contains "linkedin") 

Will look how it woks.