So after I defended Sactuary from Raiders my Settlers have been stuck at the "Thanks for your help" dialogue. I've tried waiting for 24 hours and fast traveling. Anyone know how to fix this?

I had the same thing on xbox, I fast travelled to the castle to speak to Preston and it came up completed... good luck though.

I gave up trying to talk the vendor, carried on with a few more quests and tried later. This seems to becoming a common occurrence just recently.

This happened to me last night after a Deathclaw attack on Sanctuary. I waited 24 hours ran to Red Rocket and back and they were still thanking me for my help. It was fixed after i fast traveled to a fish packing factory for a quest. I cleared the building then went back to sanctuary to unload all my junk and the vendors were working again. I was wondering if it's caused by the dead bodies being in view of the settlers because when i went back and they were working the dead Deathclaws had gone.

since i posted earlier, i have encounterd this with vendors aevery time a settlement is attacked now.

Yep it also happened to me....how I fixed it was I fast traveled to castle slept a bit then fast traveled back to sanctuary and all was good, but it is a issue that needs fixing?