Many things can ghost trip a GCFI, related to sudden current changes, motors getting dirty and self grounding but I find most often it to be significantly sized transformers that are plugged in downstream on an outlet connected to the load side.

Try isolating one thing at a time to determine the culpret.

if you have a ground loop on the cable tv/modem, then i bet it is causing at least some of the trips. cable installers RARELY bond to ground properly, they usually just grab the closest thing that looks like it may be grounded, if they even hook ground up to the line! go outside and look where the cable first reaches your house, there should be a splitter or a distribution block that has a ground wire going to something. if it does not go to your ELECTRICAL ground, it will ghost trip GFCIs sometimes.

Only if there is a serious defect in the cable equipment should this make a difference, in which chase the GFCI isn't ghost triping it is BEHAVING PROPERLY.