Over the last several updates the lasso tool has gotten a delay when you try to select something. It happens when you select something with a small lasso area. Larger lasso areas do not create this delay. I'm not sure if this is intentional, but it's made the lasso tool much less user friendly.

Here are some steps to reproduce the issue.
1. Create a line or dot with the highlighter tool
2. Select the lasso tool (either regular or rectangular) and select the highlighted dot using a small circle
3. Note that the dot is not selected for up to half a second while the lasso tool pauses