In the past and still working:
The functionality of an activated loop timer is reset by a 5 match by swap.
While playing a heavy orb conversion deck the loop timer may never appear because the time resets on every 5 match by conversion. The only chance to stopp this is to play only cards that do not convert gems in a row from this deck. This may never or very rarely appear depending on the cards in this deck.
For my titanomachy deck it took about 20 minutes until it happened leaving 38 extra swaps…

