I am using Indesign CC 2015 in OS X (10.11.4).
When I'm trying to use the select tools (either one), my cursor changes back to the text tool automatically. This happens over and over. Using the keyboard shortcut "V" switches to the select tool momentarily, but when I click a box (say a text box to over it up a bit or move it) the cursor changes back to the text tool before I can even click. This was going on before I updated to the newer CC and OS X, too.
The cursor doesn't have to be over a text box when this happens and may not even be over the page or anything else.
Have trashed the preferences - no help.
Any advice would be appreciated!
What happens when you go into Preferences > Type and turn off Type Tool Converts Frames to Text Frames?
Is it possible your mouse button is wearing out and is misfiring?
I had the same problem. I did erase all preferences under the TYPE menu, and it worked.