I've had to deal with lag spikes in an older version of Bandicam but since nobody is replying to me on that post, I'll just post this instead.
I've updated to the latest version of Bandicam (4.6.2) and I tried to fix the problem where it won't record Minecraft the way it should. Basically, I use Screen Recording Mode to record Minecraft, and when I press record, the timer will stay on 00:00, but if I click onto maybe Bandicam's window, the timer goes normally and I can go back to Minecraft but the timer stops again like as if I paused it (but I obviously didn't). Yeah, it's hard to explain but if you were next to me while it was happening, you would know what I'm talking about. :P
Anyway, I'm going to see if it does the same thing with Roblox (it might act diffrently though since I'm pretty sure Roblox uses DirectX and Minecraft uses OpenGL but we'll see).
And like always here is my settings -
And my computer specs -
Intel Pentium CPU B960 2.20 GHz
Intel HD Graphics (Sandy Bridge)
8 GB RAM DDR3
Windows 10 Home