Okay , i’m 99% sure these methods won’t work permanently . Because real reason is different , you’d be shocked to know ..Google uses your keywords to improve suggestions , but even if you disable suggestions it’d keep collecting your frequently used words ! [PERMANENT FIX ⬇️]

Language & input –> Manage Keyboard –> Gboard –> 2nd last option ( Advanced) –> disable everything ( share usage stats , improve voice & typing … ,Delete learned words if you don’t use dict ) . Now force stop , clear cache .. voila ! Everything works perfectly !!!

Admin , you may aswell include these steps !