The hunting reroll system has been behaving oddly since the update on the 1st. Today I actually remembered to sit down and get all the info on what's happening.

• Description: It seems that every time you click Reroll, it actually happens twice. You're charged double the pebbles and the reroll counter goes up by 2, though it only shows it going up by one unless you refresh. This causes an error message if you try to reroll twice in a row.
  
• Error Message: "Price mismatch, refresh and try again."
• Browser/Device: Mobile chrome & desktop firefox
  

Here's a detailed sequence of events from my testing:

• counter starts at 1000p 0/5
• click reroll, success
  
  • [didn't think to check pebbles this time]

• counter shows 2000p 1/5
  • [if open Hunting page in a new tab, shows 3000p 2/5]
• click reroll on original (2000p 1/5) tab
  • "Price mismatch, refresh and try again."
  • does not reroll, [didn't think to check pebbles]
• refresh, now shows 3000p 2/5
• click reroll, success
  • pebbles actually decreased by 6000p

• counter shows 4000p 3/5
  • [if open Hunting page in a new tab, shows 5000p 4/5]
• click reroll on original (4000p 3/5) tab
  • "Price mismatch, refresh and try again."
  • does not reroll, no pebbles taken
• refresh, now shows 5000p 4/5
• click reroll, success
  
  • pebbles actually decreased by 10,000p

• counter shows 5/5
  

Just bumping this again because it's still an issue. I would really like to have this ironed out soon, and I'm sure many others would as well. We only get so many rerolls per day, you know?

I am experiencing this same bug. Not only is this annoying due to the fact that it is wasting our hard-earned pebbles, but with the hunting event this week and for some reason this reroll being limited at 5 (unlike other NPC pebble sinks, which simply cap out at the cost of 5k) and most hunts having impossible synergy combo requirements, it is making it a bit of a drag to participate in this week's event.

Hopefully it can be fixed soon.