Factorio Forums

viewtopic.php?f=51&t=54612&start=380#p350551

Basically, when you research a technology, any existing bodies that you have that are not currently controlled do not get their toolbar upgraded.
new ones that you build after researching the technology do include fully upgraded toolbars.

This may apply to others researched effects too.
Tested, same issue with inventory size research.

All characters are correctly associated with a player via scripts.

Required mods:
https://mods.factorio.com/mod/bobclasses
https://mods.factorio.com/mods/Bobingabout/boblibrary
For inventory size research (and more tiers of toolbelt):
https://mods.factorio.com/mods/Bobingabout/boblogistics

Thanks for the report. It's now fixed for the next version of 0.16.