I have a feeling minsan minsan...

I have a feeling minsan minsan...a speaker might avoid the presence tense of a verb by employing nakaka- rather than faithfully conjugating the affix...I'll hear someone nag- the past tense and then switch to nakaka in the continuing form...OF course nag can be too "strong" for repeated use...but a trusted Tagalog hinted he felt nag double double was pangit...and shifted in his style....to nakakaAny thoughts?