The junction


This photo shows the connection between a corner vertical mullion and  two horizontal mullions. The shear block connections are misplaced. Thin glass gasket and glass will create a gap, because the glass receptor surfaces are misaligned
These gaps would definitely constitute a future leak origin. See also the next photo showing the same condition.

This deficiency I have tracked the next day after installation and I pointed it out to the installer, off the record. He assured me this will be remedied shortly. I waited one week to no avail. Another week later I decided to write the report - without any response, as usually.
Only the angry owner's representative's visit on the construction sitemade a trick few months later. The curtain wall installation has been very advanced at this moment, so it took lots of time and effort to fix this relatively simple defect.

The photo below shows the same connection between the corner vertical mullion and  the horizontal mullions shot from below.