This is a practice fraught with danger.
All it would take is one or two owners to turn up to the adjourned meeting and vote against “the vibe” of the owners at the original meeting.
Any proxies given to the strata manager after the scheduled start of the original AGM should be considered invalid as they should be received by the secretary prior to the meeting date/time (and at least 24 hours before for a large strata scheme).
You need at least one owner in attendance (physically or by proxy) at an adjourned meeting for it to proceed so if the Strata Manager has no valid proxies allowing him/her to cast a vote at the adjourned meeting and no owners physically turn up then the adjourned meeting will not be able to proceed.