Advanced C# problem: Timings incorrect in script, assigning a variable that is not updated yet in an array.

Dear developers,

I am trying to make a match-three game from scratch ( a game like Candy Crush ) and I stumbled upon a timing issue I can't seem to resolve. I do not know how to get started.

When I switch two pieces, at the end at their moving co-routine I set the pieces to their new position, and update the 2 dimensional array where I store all pieces and raise an event saying it has stopped moving. In a handeler I wrote, check if its partner piece has matches. (the one we swapped with) and check if the piece itself has matches.

If they both don't, obviously they swap back. This works.

But if one of the pieces has a match, clear out the matches. As the other has to stay in the same place. This doesn't work.

I check with the debugging tool and found the problem, but I don't know a way to solve this and reach out to you guys for help since I am yet a beginner.

Here is the code I use: PasteBin link

Thanks in advance, I hope you guys can help. Otherwise I will just start over.