Anachronus - murlocs interaction

Some of my murlocs do not appear on the board after Anachronus was played by the opponent. The board IS occupied by “them”, but nothing is seen. E.g. if i can see 3 minions on my board, there are 4 minion spaces that are occupied (i cannot summon another minion from my hand) and also i cannot interract with those (i cannot select them with mouse, therefore cant attack) however the end turn button is still yellow clearly suggesting there would be some possible actions with them.