Various caneberry varieties set noticeable buds, up and down the cane, late in the season. These typically remain tight and dormant until next spring. No concern unless the buds break and start to grow leaves out-of-season.
The two pale tiny buds near the base of the plant are not primocanes.
How close to the old cane is that unwanted tip-root?
Basal buds tend to be larger than those way up the cane or on laterals, and the resulting fruiting spurs are thicker and longer.
I suppose mulch could have affected it. I keep mulch away from the base of canes, but there are colder-climate growers who bury entire caneberry plants in mulches, maybe they have observed similar budding.