Squirmy delight does not give 100k mana when eating, the 275 stat buff it gives goes away shortly after eating as well.
As of tonight, this is still occurring. I ate it for the buff, not to replenish, so I cannot say for certain that it was not doing so, but the buff never appeared the first time I ate it. I did get a debuff that caused my character to "throw up". I tried a second time, got the buff AND the debuff & as soon as my character threw up again, the buff was gone.