Minor stringing issue, only happens in helpers & infill areas
If the problem occurs in or immediately following printing of support material, it's probably Cura's Limit Support Retractions option, which defaults to on. This is probably the single worst default Cura has, and it causes all sorts of problems - surface defects, difficult-to-remove support, underextrusion, etc. - due to basically skipping all (necessary!) retractions while printing support.
If the problem occurs in infill area, it's probably Combing. Lowering Max Comb Distance With No Retract to something very low (150-200% of the nozzle width, so like 0.8 mm) should make this problem go away, but at some nontrivial cost to print time. If you make this change, you almost surely need Zig-zaggify Infill enabled if you want to avoid very high cost to print time and excessive retractions.