i brewed a few norfolk wherrys now, normally bottled in 1 litre plastic bottles without any issues. i bottled the last batch in some groulsh bottles i got from my local. the problem is though that it has cleared well, but when i open the bottle (flip top caps) the sudden release in pressure seems to lift the sediment off the bottom making it undrinkable. why is this happening? has it happened to anyone else?