Bug Or?

Over the course of the last week or so I've faced about 5 opponents that when I'm at crucial points- be it for energy attachment or selecting an attack, the game just stops letting me use functions and does not even display a turn timer until it runs out and ends my turn. In my most recent match against SM1TT1 and their lost zone, I went second and after I attached my energy the game stopped allowing me to function and use Kyurem Vs first attack for 1 energy. No timer displayed at all.

For arguments sake I've had this happen using Miraidon decks as well, not sure if it has something to do with the energy attachment or what.