XF 2.1 Users asked to log in repeatedly

[sleepyhead]

Hi,
We have just completed a move from Vbulletin to Xenforo on https://www.salmonfishingforum.com/forums/
Some users are reporting that they are continually being asked to log in when they are on the front page. They have 'stay logged in' checked. It seems to be happening on ipads and iphones. Does anyone know why this is happening?
Thanks

 

[Buffaloed]

Make sure they're not using private browsing
Check https://www.salmonfishingforum.com/forums/online/ and if you see cloudflare IP's , apply this fix https://support.cloudflare.com/hc/en-us/articles/200170786
If you have another install on the same domain (eg development version) they should have different cookie prefixes

 

[AndyB]

Make sure you have this checked:

Admin -> Setup -> Options -> Basic board information -> Enable board URL canonicalization