"The H-I-1216 Line at TIMED looks though very different from the lines around 1216 nm in SORCE, which probably displays how difficult and error prone calibration and background adjustments really are."
This is because the 1216 Line is actually a 121.6 line.
Anyways the O IV 554 Line had been adjusted and on the first sight it looks more or less "normal", so does the O III 704 and H I 121.6, i.e. they seem now to more or less follow the solar cycle: https://lasp.colorado.edu/lisird/data/timed_see_lines_l3a/
The O IV 78.8nm line though increases and what I think is the Lyman Alpha line H I 121.6 (https://en.wikipedia.org/wiki/Lyman_series) looks slightly elevated in the minimum in 2019 vs 2008.
Concerning the encircled regions in 9. above, I checked the SORCE mission https://lasp.colorado.edu/lisird/data/sorce_ssi_l3/ at 689.85nm, 774.51nm, 798.83nm - and 486.32nm and 509nm they were still visibly increasing until the end of mission at 26.02.2020. The new mission shows also increases for this range: https://lasp.colorado.edu/lisird/data/tsis_ssi_24hr/
I find this now quite disconcerting.