Has anyone noticed if their 11.3.1 devices report their version as 11.3 instead in the Safari user agent string?
Example for an iPad updated from 11.2 to 11.3.1:
Mozilla/5.0 (iPad; CPU OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
Neither the “OS 11_3” nor the “Mobile/15E148” part seem to be right!