This is exactly what I would expect a person to say about the fourth... Not that I didn't want to hear it, but I often find myself going from the fourth to the root and it sounding a bit tense maybe, but still "okay" to my ear. I'm thinking I might just be colouring the chords into an eleventh when I do this which is why my untrained ear is willing to go with it. I've done my best to stop myself from doing this, but still find myself being drawn there every now and again when I'm not paying too much attention. I feel like this may be from me playing to many Sus and 11 chords on guitar and listening to a bit too much Santana. It's bleeding into my lines almost, which could work on lead guitar I guess, but probably not so much for harmony on a bass.
I had the same problem and had to really train myself not to do it. It helped me to practice without passing tones and just stick to arps/chord tones until they were pretty much filled j, then start experimenting with unscented paying tones or leading tones into the chord notes or roots that I wanted to really hit. The cool thing about walking is that you don't really need to embellish much, if you have good pocket and the soloists can hear the changes through what you (and any other accompaniment) are doing, you're in good shape.

