Hi. I've never seen that kind of cursor warping behavior from inspection/annotator-based tooltips, but that message is specifically coming from Salesforce Code Analyzer via the associated code inspection. That provides several options for how to disable it. First, you could just disable that inspection altogether:
If you still want results from that inspection, you can instead configure the inspection for a different minimum severity, particularly since cpd is being reported as sev5, or to show less information in the reported violations.
Alternatively, you can configure Salesforce Code Analyzer itself to disable the CPD engine or to change its thresholds for how/when it detects duplicate code:
Please let me know if that doesn't help.
Regards,
Scott Wells