CPT-onomies wordpress plugin: Empty rows in checkbox

I have a wordpress site with 4.4.2 version. I have been using this plugin perfectly for months but, sudendly, when I enter in any post or custom post where I have a custom taxonomy, “movies” in my case, I can see in the checkbox many empty rows. This is a partial from the google inspector output:

<ul id="filmschecklist" class="list:films categorychecklist form-no-clear">

<li id="films-3032"><label class="selectit"><input value="3032" type="checkbox" name="_custom_post_type_onomies_relationship[films][]" id="in-films-3032" checked="checked"> Teen Wolf</label></li>

<li id="films-881"><label class="selectit"><input value="881" type="checkbox" name="_custom_post_type_onomies_relationship[films][]" id="in-films-881"> ¡Aterriza Como Puedas!</label></li>

<li id="films-4242"><label class="selectit"><input value="4242" type="checkbox" name="_custom_post_type_onomies_relationship[films][]" id="in-films-4242"> ¡Biba la banda!</label></li>

<li id="films-882"><label class="selectit"><input value="882" type="checkbox" name="_custom_post_type_onomies_relationship[films][]" id="in-films-882"> ¡Jo, Que Noche!</label></li>

<li id="films-"><label class="selectit"><input value="" type="checkbox" name="_custom_post_type_onomies_relationship[films][]" id="in-films-"> </label></li>

<li id="films-"><label class="selectit"><input value="" type="checkbox" name="_custom_post_type_onomies_relationship[films][]" id="in-films-"> </label></li>

<li id="films-"><label class="selectit"><input value="" type="checkbox" name="_custom_post_type_onomies_relationship[films][]" id="in-films-"> </label></li>

In the checkbox appears all films, but, between them is there many empty rows... ¿any idea?

via Chebli Mohamed