I've just been using the BladeRF 2.0 A4 and found some interference. The antenna is a 20cm monopole.
To demonstrate the interference I have modified GQRX and wrote a python script to control GQRX and take a screen shot at the frequencies that this interference is most noticeable. Then the screenshots were compiled into a mp4 video and uploaded to my Google drive.
Here's a link to the video file on my Google drive.
sweep.mp4
You can view it on Google but for the best quality you have to download it.
I live within 200m of a cell tower. Could this be the source of the interference?