Well you've got me STUMPED.
That's not thrip damage. But it also isn't interveinal chlorosis in any form I've seen it before- it looks FAR too mottled. Yes, there is some chlorotic shit going on there but the pattern is very strange.
Neem oil, or BANG!, or Wilt-Pruf, all create physical barriers on the leaf surface and prevent moisture loss. Bang! was designed to be ued sort of as a band-aid after a mite infestation, think of that clear 'second skin' bandage they use on road rash and other abrasions. With any of these, apply VERY lightly, allow to dry, monitor for signs of leaf darkening (indicating suffocation), and reapply lightly if you think you still need more. The leaves should be just slightly glossier than when you began.
Since there almost certainly IS a burn going on, a good flush with pH adjusted water, finishing with 1/4 strength grow fert at pH 6.7, is a good idea. Repotting into a larger pot, if you don't have that gallon of soil per foot of plant, will also help stabilize your soil- soil chemistry gets crazy fast when you simply don't have the VOLUME to support that rootball.
This probably wasn't much help... but... ?? Hopefully Rhizome will cruise by this thread- if there's anyone who has 'seen it all', lol, it's him.