Front power window chatter and tape on window

I bought my 2017 Prime used. Since I've owned it sometimes when opening the front windows I'll get a noise initially like chatter or like the window is slightly stuck. Washing the car today I noticed that there appears to be a small triangular piece of tape on the inside (bottom front in back of the overlapping door trim) both of the front windows. The tape has a strange swirl like texture to it. My neighbor also has the 2017 and doesn't appear to have this "tape". Does anyone else have this issue and this tape? I didn't want to try to remove it until I know it's purpose if there is one. Thanks

 

Yes it's really tough to take pic of clear glass and clear tape. The taped area has a series of texture like markings that almost look like the beginning of an exponential curve. Both sides look like this. This pic might be a lot better

 

Yeah it almost looks like someone removed a tint quickly and did not want to take the door trim off to remove the portion in back of that. But it's not tinted so maybe just a UV film? I think if I can get it started I can peel it off but there might be residual adhesive left over. I guess in the worst case I can remove the door panel trim. I had to do that on my 2004 Prius to install speakers so that can't be very hard once I determine where the clips are. I'm sure this is probably why the window sometimes chatters or makes a "break away" noise initially on opening, lol.

 

Yes, thanks for the suggestion. I just watched a video of removing the door trim if I have to do that. Not much room to work without doing that if the adhesive doesn't come off but pretty easy once the panel is removed. I hate to deal with plastic snap fits, lol. They always have a very limited life. Thanks again!