I am having this issue with level 975 and it is impossible to pass. It seems like there is a bug in the code that makes random levels impossible to pass.
This also started about a month ago and I have submitted multiple tickets with all being labeled as "Fixed" but it is not.
for my impossible level, it is a rain level and toward the end, it just dumps about 10 tiles. Sometimes I have all matches, but the game does not recognize it or there are 2-4 unmatchable tiles. I have included screenshots for 2 of the multiple games I have played.