Why did predictive text just stop (between one text to next)?

[Windows Central Question]

I have a Nokia Lumia 635. It happened once before, then just came back, yet, I did not do anything.

 

[Chintan Gohel]

I have a Nokia Lumia 635. It happened once before, then just came back, yet, I did not do anything.

Odd glitches. Sometimes when I heavily use word flow, the keyboard freezes