I've done some testing on the bug. It seems to be triggered by too many levels in "complete ticks" bumping the next tick requirement over e308. If you stop at claiming exactly 1012 claims of that achievement, the Gain Cells achievement will not bug out. I claimed over 17500 player level achievements just to see and the bug did not appear. As soon as I cross 1013 Completed Ticks, the gain cells achievement will bug. Sometimes it won't bug until after you restart the game, so inevitably it will.
Now the question is, it it worth it to stop there and have the extra LP or have maxed tokens. I think in the long run it's worth stopping at 1012.
As for if you already past this point, I am not sure of a solution to fix it.