I think the version is not the problem. There is another condition that produces the bug and for now i didn't identify it.
Some other facts : on monday, i didn't have the bug anymore. And today I have it back. I think the total number of pokemon in my account may be the last condition.
Actually, I have exactly 736 pokemon (20 full boxes, box 21 almost full and 4 poke in my party). And with that, I have the bug.
I'll continue trying to find this special condition to reproduce it everytime. If you have any other idea of things to test, let me know.