Issues when banning with special caracters

[Luke081515]

1. I set the ban: 17:01 -!- mode/#wikimedia-ops [+b $x:Lorena_ramos_💜] by Luke081515_ (default expiry 5h for that channel)
2. eir tried to remove it: 22:09 -!- mode/#wikimedia-ops [-bo $x:Lorena_ramos_ð_R\ eir] by eir (as you can see, he can't grab that special caracter) - (It seems like this removal was not successful, normally he reports every removed ban to that channel. Not this time...)

And then eir tried to remove the ban again:
22:41 -!- mode/#wikimedia-ops [+o eir] by ChanServ
22:41 -!- mode/#wikimedia-ops [-bo $x:Lorena_ramos_ð_R\ eir] by eir
22:52 -!- mode/#wikimedia-ops [+o eir] by ChanServ
22:52 -!- mode/#wikimedia-ops [-bo $x:Lorena_ramos_ð_R\ eir] by eir

Without comment here too. Then I tried to fix the situation by removing the ban manually:
22:57 -!- mode/#wikimedia-ops [-b $x:Lorena_ramos_💜] by Luke081515_
22:57 -eir:#wikimedia-ops- (REM) ban[92532] $x:Lorena_ramos_ð_R\ was set on #wikimedia-ops by luke081515_!~luke08151@tnb/staff/luke081515 on 2016-08-11
17:01:17Z with reason "spamming" and had an expiry date of 2016-08-11 20:01:17Z. It was removed by luke081515_!~luke08151@tnb/staff/luke081515 on
2016-08-11 20:57:47Z
As you can see, eir can't accept that 💜, so he tries to remove that ban, but can't do it, so he tries again and again...