Hi! Im sorry it its not a bug, or if this is pending a solution.
First I got this issue in version 4.16, then I switched to 4.18, all fine.
Then It started over again.
After many tries, I discovered that enabling SHOW MOUSE CURSOR
causes the mouse input to lag.
In other words, any event that fires using mouse input (left ou right clicks) gets delayed when Show Mouse Cursor is on. As soon I disable the Show Mouse Cursor, the event fires with no lag.
For lag, please understand that it only happens in this one event, using the mouse input.
If you click several times, the event only fires sometimes. Its like you click fast 2 times, and the events fires 1 time.
All setup was done inside Blueprints,.