text disappear in indesign cc

@DIGITAL3829417888b2s2

Can you describe what exactly are you doing? 

Because, from the video, it looks like you're just moving your cursor over a TextFrame? 

I think I see an anchored object with a connecting line. 

As @Pariah Burke  says it looks like it has text wrap on it and when moving it is reflowing the text. 

If you can share a sample file we can probably work out what's going on. 

But best bet is that it's anchored object with text wrap.

https://helpx.adobe.com/ie/indesign/using/anchored-objects.html#:~:text=To%20anchor%20an%20existing%20object,anchored%20object's%20position%20is%20inline.

https://helpx.adobe.com/ie/indesign/using/text-wrap.html#:~:text=To%20display%20the%20Text%20Wrap,want%20to%20wrap%20text%20around.&text=Creates%20a%20rectangular%20wrap%20whose,any%20offset%20distances%20you%20specify.

It's very difficult to see what's happening in that video.

Do you have any objects with text wrapping?