Passing many latlong resulting ?????? in encoded string about polyline

[aychung]

I have the same issue.

example coordinates
[[37.898202,-122.291911],[37.89817,-122.291815],[37.898113,-122.291644],[37.8981,-122.291605],[37.898054,-122.291468],[37.897926,-122.291079],[37.89791,-122.290938],[37.897889,-122.290756],[37.897886,-122.290726],[37.89787,-122.290583],[37.897826,-122.29018],[37.897825,-122.290063],[37.897825,-122.289889],[37.897825,-122.289862],[37.897825,-122.289722],[37.897825,-122.28948],[37.897851,-122.289223],[37.897868,-122.289058],[37.897874,-122.288996],[37.897886,-122.288869],[37.897925,-122.28848],[37.89801,-122.288326],[37.898102,-122.288161],[37.89814,-122.288092],[37.898212,-122.28796],[37.898425,-122.28758],[37.898536,-122.287356],[37.898625,-122.28718],[37.898635,-122.28715],[37.89864,-122.287135],[37.898649,-122.287106],[37.898692,-122.286977],[37.898707,-122.286934],[37.898592,-122.286946],[37.898519,-122.286955],[37.89825,-122.286985],[37.898136,-122.286998],[37.89782,-122.287014],[37.896872,-122.287061],[37.896557,-122.287078],[37.896187,-122.287088],[37.895078,-122.28712],[37.894709,-122.287132],[37.894329,-122.28714],[37.893189,-122.287163],[37.89281,-122.287172],[37.89243,-122.287172],[37.891291,-122.287172],[37.890912,-122.287172],[37.890917,-122.287067],[37.890934,-122.286752],[37.89094,-122.286648],[37.890953,-122.286458],[37.890992,-122.28589],[37.891006,-122.285701],[37.891017,-122.285454],[37.89105,-122.284714],[37.891062,-122.284468],[37.891073,-122.28427],[37.891105,-122.283679],[37.891117,-122.283482],[37.891131,-122.283276],[37.891143,-122.283024],[37.891162,-122.282751],[37.891165,-122.282623],[37.891171,-122.282409],[37.891133,-122.282407],[37.890975,-122.282399],[37.89081,-122.282372],[37.890789,-122.282365],[37.890623,-122.282313],[37.890325,-122.282199],[37.889921,-122.28207],[37.889699,-122.281991],[37.889406,-122.281888],[37.889336,-122.281866],[37.889201,-122.281824],[37.888796,-122.281699],[37.888661,-122.281658],[37.888487,-122.281639],[37.888384,-122.281643],[37.888262,-122.281666],[37.888242,-122.281672],[37.8881,-122.281724],[37.887059,-122.282128],[37.886666,-122.282281],[37.886527,-122.282357],[37.886303,-122.282481],[37.886113,-122.282588],[37.885975,-122.282666],[37.885851,-122.282764],[37.885479,-122.283058],[37.885355,-122.283156],[37.885043,-122.28196],[37.884974,-122.281994],[37.884363,-122.282288],[37.884371,-122.281902],[37.884176,-122.282009],[37.882718,-122.282569],[37.882526,-122.282764],[37.882502,-122.28279],[37.882518,-122.283012],[37.882491,-122.283671],[37.882491,-122.283757],[37.882491,-122.284107],[37.882469,-122.284953],[37.88246,-122.285078],[37.882445,-122.285271],[37.882437,-122.285376],[37.88244,-122.285853],[37.882442,-122.286048],[37.882444,-122.286282],[37.882448,-122.286742],[37.882516,-122.286978],[37.882558,-122.28712],[37.882569,-122.287157],[37.882587,-122.287202],[37.882625,-122.287302],[37.882742,-122.287602],[37.882781,-122.287702],[37.882871,-122.287934],[37.883048,-122.288512],[37.883179,-122.288939],[37.883284,-122.289309],[37.883295,-122.289348],[37.88326,-122.28951],[37.883251,-122.289555],[37.883179,-122.289757],[37.883146,-122.289964],[37.883155,-122.290105],[37.883156,-122.290113],[37.883163,-122.290207],[37.883174,-122.290252],[37.883025,-122.29028],[37.883037,-122.290283],[37.883189,-122.290316],[37.883205,-122.290383],[37.883311,-122.290831],[37.883245,-122.29106],[37.883233,-122.291245],[37.883229,-122.291302],[37.883209,-122.29141],[37.883141,-122.291802],[37.883137,-122.291906],[37.883132,-122.292074],[37.883126,-122.29225],[37.883119,-122.292481],[37.883059,-122.292775],[37.883024,-122.292949],[37.882988,-122.293126],[37.882955,-122.29377],[37.882939,-122.293852],[37.882911,-122.293992],[37.882752,-122.294373],[37.882746,-122.294602],[37.882775,-122.294707],[37.882977,-122.295448],[37.88301,-122.295688],[37.883046,-122.295958],[37.883065,-122.296092],[37.88318,-122.296231],[37.883329,-122.296356],[37.883473,-122.296629],[37.883516,-122.296709],[37.883511,-122.296756],[37.883498,-122.296891],[37.883475,-122.297118],[37.883472,-122.297153],[37.88334,-122.297749],[37.883326,-122.297786],[37.883266,-122.297955],[37.88325,-122.298001],[37.883197,-122.298151],[37.883165,-122.298288],[37.88301,-122.298969],[37.882984,-122.29917],[37.882956,-122.299392],[37.88295,-122.299469],[37.882938,-122.299614],[37.882923,-122.299808],[37.882889,-122.300049],[37.882869,-122.300194],[37.882808,-122.300628],[37.882802,-122.300674],[37.882763,-122.30109],[37.882665,-122.30152],[37.882571,-122.301901],[37.882567,-122.301921],[37.8825,-122.302331],[37.882495,-122.302354],[37.882456,-122.302525],[37.882454,-122.302599],[37.882451,-122.30274],[37.882407,-122.302948],[37.882313,-122.303128],[37.882277,-122.303318],[37.882275,-122.303537],[37.882273,-122.303568],[37.882247,-122.303967],[37.882249,-122.304018],[37.882269,-122.304383],[37.88226,-122.304504],[37.882209,-122.305229],[37.882182,-122.305367],[37.882098,-122.305811],[37.882055,-122.306036],[37.882011,-122.306269],[37.881938,-122.306714],[37.881902,-122.306941],[37.881879,-122.30708],[37.881912,-12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nvm. adding precision resolved the issue.