Ok, this is a weird one!
The game started to lag every time exactly when i clicked "make runner pay 3" on Tollbooth.
It would lag for both of us.
As an additional annoyance, I was not able to click "no more actions". I had to F5 to rejoin the server, then I could click "no more action".
We ended doing TB manual since it was very consistent: every time i clicked TB to make runner loose credits, the game grinded to a laggy halt :(

Sounds like the engine is crashing when it's clicked! Thanks for the report, I'll take a look.
Is this still happening?
@NoahTheDuke Tollboth has been changed to automatic on-encounter effect and works fine. This issue should be closed :)