Dear @ABraun,
this is a common error, which occurs in regions with a high density of measurement points. I was not able to figure out why this is happening in detail. Anyway, I wrote a work around to avoid this included in the current version of the visualizer in the manual within the application, which you can find here:
stamps_visualizer_installation_guide.html (2.8 MB)
stamps_visualizer_20.tar.gz (488.6 KB)
@mdelgado for SBAS processing, I will probably work on this project next month in order to present a stable workflow, I will present it here, but maybe it will take more time, I can not grant it 