I don't know if you're aware, the Nuclear Tech Card still appears as a bottle when being belted.

Screenshot
https://i.imgur.com/2gCuEQ9.png

Slightly related. A recent update caused all of my old bottled nuclear tech, that was created in the centrifuge/atom forge (before requiring the research server) to become Particle Physics cards.

Oh god that's weird. I'll look into this if xyrc's not already doing so, see if I can figure out the cause for both of these.

Cool, thanks. Though I'm not going to complain about the thousands of free particle physics tech cards.

XYRC's busy at the moment so unsure when my changes will be merged, but I've fixed the "Nuclear Tech Cards are still bottles in overworld" graphical issue, and hopefully fixed the "Nuclear Tech became Particle Physics Tech" issue (my guess is it was a lack of migration of data that caused it, so I put migrations for all of the science > tech card conversions in my changes - won't revert your free particle physics but will hopefully prevent the issue for other people?).