Hello there, the visual bug is well known for Synch + Role Play where the copied ability will linger around even after battle and cannot be fix unless by logging out(some players have success with just healing at Pokecenter) and the staffs said it won't effect the Synch ability.
But, I've had similar case like you during my hunt for H.A Tentacool where I've got 12~14 H.A Tentacools/ Tentacruels without luck of finding the Bold nature. I'm using Role Play with my Bold Sync Kadabra the entire time and started to getting frustrated and wonder if it's even working or bugged.
So, I try to search on PRO forum and found similar complaints like you and mine,
https://pokemonrevolution.net/forum/viewtopic.php?t=25026
https://pokemonrevolution.net/forum/viewtopic.php?t=29900
Staffs and other players insist on it for just bad luck and working as intended. It still doesn't convinced me enough though so I took the suggestion by x3jenli to bring two Kadabras for hunt. One for Synch and another for Role Play. It's a bit troublesome to switch all the time but surprisingly it works wonder for me. I kid you not, I found 3 Bold H.A Tentacrools/ Tentacruels consecutively after that.
Just some reminder, I'm not dismissing the idea of bad luck entirely. I might've been really unlucky before that, but I'll just stick to this method for now at my own conveniences. Hope it helps, good luck.