Handwriting doesn't recognize 咗

Only recently incorporated Cantonese into self teaching routine and found that Pleco doesn't recognize 咗 although iOS does. Do I need to download an additional add-on to for HW recognition to work for characters like the above mentioned? I'm just starting out with Cantonese so if I've missed a nuance because I'm a newbie, and it's something obvious, apologies in advance.
 
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