Taipan-4fr pattern progress stuck at 1/2 after 3 red border dismantles
This appears to just be a visual bug - I was curious and checked just now and I was able to craft it even though it's not showing up as unlocked on the pattern/catalyst screen.
I'm not 100% sure, but I think this happened because I already had a red border Taipan-4fr when I started the quest to get the free patterns at the Enclave/relic, and I somehow skipped a quest step.
The Triumphs track progress for the quest that drops 2 guaranteed Deepsight Resonance copies of Ammit AR2 and Taipan-4fr, while the weapons can be crafted after 2 patterns have been extracted regardless of quest progress.
Progressing the quest should mark the Triumphs as complete.