The bolster on my 26" Chitlangi (Bura) has a tiny amount of movement; barely a millimeter of movement.
It doesn't seem to affect any functional ability or structural integrity though. The rest of the handle is still secured nice and tight.
I reckon it's just a case of the laha not sealing fully when it cooled and solidified.
I have five H.I.'s and this is the only one with this.
I beat it around against the post and did some power blows into an oak log with it and it hasn't loosened up any further.
So I'm not worried about it.
However, I'm more or less indifferent to the habaki style bolsters. I'd rather prefer the traditional bolsters but I use my khukri's and as long as they function fine, it's not really a big issue to me. I'm not interested in impressing any khukri snobs which might be out there on some other forum.
I'm interested in slaying multiflora rose, clearing brush, and hacking up zombies if such a situation ever occurred.
And for that, my H.I.'s do just fine even with the (IMO) unnecessary habaki bolster.