Oppo
Double-Space Period Shortcut auf Oppo
On Oppo phones running ColorOS, the Gboard keyboard can insert a period automatically whenever you tap the space bar twice in a row. This text correction feature speeds up typing at the end of a sentence, but an accidental double tap can just as easily turn into an unwanted full stop in the middle of a word or a number.
The setting lives inside the keyboard app rather than the general phone settings, since Gboard manages its own text correction options separately from the rest of ColorOS.
To change it, go to Tap on Settings ➔ Tap on Additional settings ➔ Tap on Keyboard & input method ➔ Tap on Gboard ➔ Tap on Text correction ➔ Enable or disable Double-space period.
Turning the toggle off stops the automatic period completely, so a double space simply stays a double space. Turning it on restores the shortcut for faster sentence endings.
If periods still appear unexpectedly after disabling this option, check whether a different keyboard app is active, since only Gboard uses this specific text correction setting.