kha'zix evolution point bug

while playing kha i encounterd a strange bug. i do not know what triggerd it but after haveing all evo points and useing them i noticed ihad a free evo point i dont know what happend but it had removed my e evo point so i no longer had leap evolved. i defintly remeber evolving leap due to needing it for escapes in a 4 v 5 match. end result was i ended up with spikes evolved as it wouldnt let me put the last point back into leap.i also noted 4 second lag at the time the bug was happening.