Repeated gifs not moving

[moramaldonado]

Hi,

I have a small issue with the display of gifs using image-keyboard-response with Jspysch 6.3.1.
Gifs are displayed correctly the first time they are loaded, but if a gif were two appear a second time sometimes they are static.

For example, in the code below, the two first gifs are always displayed correctly, but the last one sometimes doesn't move. Do you know why this could be?

var trials = {
        timeline: [
            {
            type: 'image-keyboard-response',
            stimulus: jsPsych.timelineVariable('gif'),
            choices: [' '],
            stimulus_width: 450,
            response_ends_trial: true,
            render_on_canvas: false}],
        timeline_variables: [{'gif': 'desert.gif'}, {'gif':'city.gif'}, {'gif':'desert.gif'}]
    };

Thanks in advance,

Mora