Currently the R&D table is not detecting all the exobytes in my inventory. For example I have 3 Flawed Mk 15 exos, and plenty of Exo Material, but when I use the crafting table, it shows 0 Flawed Mk 15 exos and the block for crafting Solid Mk 15 exos is greyed out. I have also not seen anything salvaged actually create a mk 17 exobyte.
This has been happening for a while since GU 116. I think these broken exobytes are from salvaging the Daily Reward gear.
Pretty sure this has to do with there being 2 versions of "Flawed Mk 15"s a tradable version acquired from salvaging gear, and an account bound version from the "Daily Reward"(Day 16). They are considered distinct items by the game (they have different item ids), and the R&D "plans" are only designed to use the original version from salvaging gear.