Cursor does not reflect point of text insertion

I'm a brand new user. My cursor (in an .R script file) displays as a solid line, but where the keys actually type appear to be 5 spaces behind the cursor! Said differently, where I type, the cursor appears 5 character spaces ahead of the character. This leads to a great deal of confusion! It's hard to insert new letters or code, trying to figure out how many spaces ahead or behind I have to guess at where to place the cursor. Similarly, the cursor in the Console appears "one character space" ahead of the typed character. Please help me fix this? As a note, I have already turned OFF "blinking cursor" in Global Settings. That made no difference.

Does it make a difference what browser you use to connect to Posit Cloud?