Safari unresponsive on iPhone using WiFi, but works fine on cellular data

I have an issue where my safari browser will freeze when loading pages on WiFi, but will load after switching to mobile data by turning off WiFi. If I turn WiFi back on again the issue seems to have cleared and normal performance resumes.

I have similar issues in mail, opening a mail I get a blank screen, turn off WiFi and it loads.

There are no issues with WiFi as all other devices are working just fine

[Re-Titled by Moderator]