Characters run off

I was doing ST and BRD last night and sometimes either the pally or mage would run off into a wall or into a pack of mobs. I would then try to heal with the repeater but not get a heal. I am not sure what triggers it but if you see anything that does this or any tips, that would be a great help.

Got the pastbin below

https://pastebin.com/LdSBN1hQ

Thanks
Jez