I find that incredibly unlikely. I used to work in bot fighting on Google. Claims of Russian bots on Twitter and
especially claims by academics are invariably riddled with methodological errors that render the "research" useless. I wrote about this problem here:
https://blog.plan99.net/did-russian-bots-impact-brexit-ad66f...
These studies are seeing patterns in noise. That's why the narrative changed over time - it used to be "Russian twitter bots got Trump elected!" and now it's "they're supporting both sides .... to sow division!".
The former claim was extremely implausible but at least it had some sort of inner logic to it, in that Trump was more friendly to Russia than Clinton. The new spin doesn't even make logical sense. However it makes perfect sense if you're just picking random Twitter users and trying to explain their behaviour through the prism of some convoluted conspiracy.