EDIT: apparently somebody already mentioned this in the “Board Not Reshuffling” thread
I’m assuming this is due to whatever change was implemented to fix the total lack of shuffle when shuffle is appropriate?
Only had 1 valid match on the board (requiring me to destroy my own countdown, of course). The match should’ve caused a cascade, but the moment the first match settled, the shuffle kicked in.
From not checking board state often enough to checking too much…
Yep, I experienced it too, but in my case it was on the AI’s turn. I didn’t pay attention to how many matches were available, but they made a TU match that was at least going to drop into a purple match, and sure enough, it shuffled.
Had this happen atleast once that I can tell for sure. Cascade is happening & a pink match would’ve happened, but the board shuffled before things settled in.
Another time had the board shuffle in the middle of a big cascade, was happening fast & couldn’t verify a missed match, but would be shocked if there wasn’t one there to be made. It was shuffling with big holes on the board, before the tiles had even finished coming down.
Had this happen twice to me in the last 2 days
Same for me, noticed it starting yesterday, was waiting for a cascade… and then bam! reshuffle and turn over. 
I don’t think it’s checking it too soon. Its more like it has detected the board needs to be shuffled at the end of the cascade but adds the reshuffle command to the stack. The reshuffle command then gets executed before the rest of the stack (last in, first out also known as first in, last out). What should be happening is the reshuffle command being added to the queue (last in, last out also known as first in, first out), that will allow the cascade to happen before shuffling.
It happened a couple of times to me today. Worst was when one CD tile of IM’s Recharge ability went off and then RHulk’s anger went off. The board shuffled and it became the AI’s turn with two of IM’s CD tiles unresolved and IM stunned.
Happened twice today (in between game crashes) - both times an enemy tile was matched and should have been cleared, but the reshuffle fired and the tiles remained. Between this bug and the crashes, the game is totally unplayable for me. I’m losing out on ISO, covers, health packs, and hero points. What a crock of tinykitty!!! 
I ran into this yesterday when IM40’s Recharge countdowns went off - after the second tile disappeared, the board reshuffled and the third tile ended up a few rows higher than where the second one used to be. The CD “sweep” was already past that point, so it never finished counting down and I had to protect it for an extra couple of turns until Iron Man unstunned - at which point he stunned himself again when it went off.
Came here to post a similar scenario…
Hawkeye 2* ‘Speed Shot’ tiles start resolving at the start of my turn:
After the second tile resolves, it leaves no matches possible.
This triggers the new board shuffle logic, placing the remaining two Speed Shot CD tiles at the top of the board, so they do not resolve.
Not expected, nor ideal…
Just checking in to say that I have observed this happen to me multiple times as well. I wasn’t sure the first time, but the second it was obvious. Three 
dropped in a column, yet I had no yellow AP after the shuffle.
Also seeing this. Had three blue drop in on the top row which should have given me a match to fill 4cyc up to get me some red, but the board shuffled before it settled ending my turn without a match.
Finally had this exact scenario happen to me. Iron Battery was essentially stunned for 4 turns.
This started with the previous patch. Has happened to me about 15 times so far. Most of the time it doesn’t make a different but 2 times it cost me a match as i needed a cascade to win and it stole it from me and enemy just wiped me
I’ve had problem with loki a couple of times too,had four of his tiles in board 2 resolved then board shuffled putting other 2 above line it had already worked through so didn’t resolve till next turn,also quite a few times board has shuffled when I can see a match ready to drop.
once the ai made a move leaving what would of been an l shaped 5way for me to make but board shuffled before my turn
This happened to me this morning. The enemy did a match that should’ve led to a massive cascade, but instead it immediately shuffled. From not shuffling to being too aggressive.
I understand though, these are probably hard cases to test. It needs to be a more recursive procedure that checks whether board shuffling is necessary at certain times but not at other times.
Of course I was happy that the enemy lost a chance for a massive cascade, but that means that the same could occur to me, and that’s why I’m mentioning it here.
Just happened to me on a lightning round. I had a setup like:
I matched the teamup, but it immediately shuffled after the match, not giving me the blue.
Made a match that would’ve resulted in another match. However, the game resolved a board reshuffle before the cascade could play out.