Ipad accessibility voice control grid lines disappear randomly. Can you please help? Restart advice does not work.

Good day to you WeLoveSparky, 

When this happens, let’s be sure the overlay is enabled - Use Voice Control to interact with iPad

Use a screen overlay

For faster interactions, you can navigate iPad with a screen overlay that shows item names, numbers, or a grid.

• Item names: Say “Show names” or “Show names continuously,” then say “Tap item name.”

• Numbers: Say “Show numbers” or “Show numbers continuously,” then say the number next to the item you want. You can also give a command to perform a gesture, such as “Tap number,” “Long press number,” “Swipe up at number,” or “Double tap number.”

• Grid: To interact with a screen location not represented by an item name or number, say “Show grid” or “Show grid continuously,” then do any of the following:

• Drill down: Say a number to show a more detailed grid.

• Say a command to interact with an area of the grid: Say something like, “Tap number” or “Zoom in number.”

Tip: To adjust the number of grid rows and columns, go to Settings > Accessibility > Voice Control > Overlay, then select Numbered Grid. When Voice Control is turned on, you can also say something like, “Show grid with five rows,” or “Show grid continuously with three columns.”

To turn off the overlay, say “Hide names,” “Hide numbers,” or “Hide grid.”

Thanks.